Typeorm save duplicate key value violates unique constraint. And here on how to convert your column to an identity column. Here is the way I make the primary key with Typeorm in Nestjs entity file named 'email'. py flush but still no luck. There is no @PrimaryColumn or @PrimaryGeneratedColumn in it. There should likely be a way to ADD CONSTRAINT IF NOT EXISTS instead. You can try a query like the following to determine which table has that unique constraint defined: SELECT n. IntegrityError: (psycopg2. Jan 19, 2021 · 1. db. Expected Behavior. if I remove unique:true anything goes fine! import { Entity, PrimaryGeneratedColumn, CreateDateColumn, Column, enter code here BeforeInsert, } from 'typeorm'; @PrimaryGeneratedColumn('uuid') id: string Jan 1, 2020 · TypeORM version: [x] latest [ ] @next [ ] 0. Permission(pk=55): duplicate key value violates unique constraint "auth_permission_content_type_id_01ab375a_uniq" And if I do. Issue Type. py sqlsequencereset inventory | python manage. try: model = MyModel(name='xyz') model. json when I loaddata I get . persist(obj); entityManager. . the solution can be found sometimes somewhere else: the relationship between the entities 'profession' and 'professiongroup' is wrong. Another advantage of the @Unique syntax is the multi-column constraint ability. Th Jan 18, 2024 · [23505] ERROR: duplicate key value violates unique constraint but the same code pointing to SQL Server is fine. Apr 21, 2021 · Most DBMS will create an index structure for unique-constraints as well. id& sevice_setting. Oct 18, 2019 · I'm not sure how this happened to this table but have an issue with ERROR: duplicate key value violates unique constraint trying to use AWS's DMS service to move a postgres v10. User matching query does not exist. Sep 6, 2019 · Django admin "duplicate key value violates unique constraint" Key (user_id)=(1) already exists 1 django. Nov 12, 2021 · 1. e. See here or here for answers on how to fix the sequence problem. For example, I programmatically create 100 entities Dec 7, 2022 · For me that didn't work - because of the broken index, there were duplicate keys in the table. SaveChanges() with a duplicate set of data, an exception is thrown but it is a fairly standard InvalidOperationException, and it's Aug 29, 2016 · 2. And: When a UNIQUE or PRIMARY KEY constraint is not deferrable, PostgreSQL checks for uniqueness immediately whenever a row is inserted or modified. Apr 6, 2023 · The first statement is the check in the label table with key 'dsca10', 'label2', this is a correct check and this record exists the second statement is the check in the domain table with key 'null', this is not correct and the key must be 'dsca10', is this the reason why the save method decides to do an insert instead of an update? Feb 11, 2017 · I think you’re trolling, but I’ll bite anyways. In order to understand the Mar 6, 2023 · Does Entity inherit from TypeORM. A SELECT did not find all the duplicate keys. Now if we insert the same value of id again, it errors out with a duplicate key violation because of the unique primary key: Apr 12, 2021 · Ok, so I figure it out, in case anyone has the same problem, here is my solution. If you are looking to make each column unique along with Nov 17, 2020 · Currently if you run Model. objects. The SQL standard says that uniqueness Jul 11, 2013 · IntegrityError: duplicate key value violates unique constraint "myapp_mymodel_pkey" DETAIL: Key (id)=(1) already exists. save({id: 1, name : "New Contraption Name !"}); This solution is not an actual upsert, it's just an update. utils. Mar 14, 2019 · You cannot have duplicate keys on primary key column i. Oct 31, 2022 · ERROR: duplicate key value violates unique constraint "pg_class_relname_nsp_index" DETAIL: Key (relname, relnamespace)=(log_id_seq, 2200) already exists. I honestly don't understand what the issue is. The problem is that the whole app crashes when this constraint is not met and I have to restart the app in order to get it back online again. May 29, 2021 · I would like to follow SQL naming standards for Primary and Foreign Key names. If you have a sequencer on the field (like with a serial column type), it is likely out of sync with the table because you have done an insert and supplied a value (rather than letting the "default" mechanism handle it by getting the nextval from the sequencer). – bruno desthuilliers Jul 8, 2017 · Okay, I got it. The duplicate you get relates to one of the records in your SELECT DISTINCT Sep 8, 2015 · I am facing a problem with postgresql where it automatically takes the primary key from another table & then it starts from there. js entity At a later point some records are inserted without id and they fail with the error: Error: duplicate key value violates unique constraint. python manage. Sep 8, 2020 · For readability, I prefer for simple constraints @Column({ unique: true }) because it sits just on top of the affected variable name. daqa_rpt_tbl ( daqa_report_id bigint NOT NULL DEFAULT 'jira_tickets. Jun 27, 2023 · QueryFailedError: duplicate key value violates unique constraint "UQ_e12875dfb3b1d92d7d7c5377e22" Why does this happen? The reason is that TypeORM generates an UPDATE query that sets the email field to the new value, even though it hasn't changed. FROM pg_constraint co. into(Order) . Apache Ni-Fi: 1. When calling DbContext. From what I read is something about Postgres Oct 3, 2017 · When I run the following script, which has run successfully for me on a number of other tables I get the following error: Violation of UNIQUE KEY constraint 'versions_uk'. " I do think I know what our problem"s" are but I don't want to make changes to the code without having a reproducible test case. var modificare = _mapper. What I am trying to do is when creating an A entity (without having id fields populated by me) which has a set of B (which has id fields populated by me): Aug 18, 2014 · I want to handle the duplicate key as a special case i. Mar 2, 2023 · でも、まだ duplicate key value のエラーが発生する、嫌になって一回レコードを全件削除し、 setval を 1 にして初期の状態に戻して新規レコードを登録してみたら採番が 1 からじゃない！なんやねん！ こんな状況になってました。 May 29, 2016 · Please see my answer here How to avoid id conflicts (uniqueconstraint violation) when using PanacheEntity together with Quarkus "import. Other users then can see that and other categories. I've removed @Unique('uuid') from table B and declared it directly on column, I also had to mark column as type: 'uuid', then on join table I've used @JoinColumn decorator pointing to uuid column. The code is adding entities in a loop to a List and then trying to add them to the database using AddRangeAsync . No one assigned. this is my error: QueryFailedError: ER_BLOB_KEY_WITHOUT_LENGTH: BLOB/TEXT column 'username' used in key specification without a key length. CREATE TABLE posts (. After 2nd save call, I get "duplicate key", beacuse typeorm is inserting instead of updating, beacuse typeorm does not check for unique key, but primary key. Warning: Please confirm that this issue does not contain any sensitive information. Somehow, they need to determine if a value already exists, and this can only be done efficiently if some sort of index exists (otherwise it would require scanning the entire table). I added in a new south migration to force unique=False and all is fine and dandy now. Sometimes, working with synchronize: true can create problems/inconsistency if there are old entries present in tables and constraints change. bug driver: postgres question. oid, true) as constraing_def. I have char type primary key length of 39, and have put a unique string made up of UUID concatenate with some extra sting in it. ) We now expect every post to have a unique title. For Foreign Key, the name should be in the format FK__. Could not load auth. I had a similar problem using mysql. Cannot insert duplicate key in object 'XXX. Django-1. Generic; Feb 22, 2015 · rails rspec duplicate key value violates unique constraint after adding unique index 2 FactoryBot unique constraint violation error, when specifying id in the factory Jan 16, 2022 · I added this form, updated the settings file so that ACCOUNT_FORMS = {'signup': 'accounts. In UserEntity Class. Solved! Go to Solution. Apparently the id got defined as a sequence: Each failed insert increases the pointer in the sequence till it increments to a value that no longer exists and the queries succeed. IntegrityError: UNIQUE constraint failed: core_profile. e movie_num=20 Change Movie Die Another Day with movie_num =20 to 24-- DROP'ping tables clear out any existing data DROP TABLE IF EXISTS movies; DROP TABLE IF EXISTS actors; -- CREATE the table, note that id has to be unique, and you must have a name CREATE TABLE actors( id INTEGER PRIMARY KEY, name VARCHAR(20) NOT NULL ); INSERT INTO Oct 14, 2023 · Duplicate key constraints and Concurrency. Jul 8, 2019 · He added manually some rows on a database [ don't ask me why ] and now when I save a new entity, Typeorm throw me an exception around a primary key duplicate key value violates unique constraint "xxx_pkey". 15. To avoid it you have to make sure that the check for existence of a table, is done after some common advisory lock is taken: May 4, 2022 · I am trying to update an existing instance from a model in Django admin interface but I'm getting django. Collections. 6. This query violates the unique constraint of the email field, causing the database to reject it. My Postgres database does in fact have a myapp_mymodel object with the primary key of 1. Hi, Till yesterday everything was good on Odoo. The number of items should be well below any limit for enums, but if I reduce it to certain number of items, it actually works. Jun 19, 2012 · Duplicate key value violates unique constraint "inventory_part_pkey" DETAIL: Key (part_id)=(1) already exists. The inherited auditing entity also creates this unique index, and after trying to save a second record to the auditing table, we get a "duplicate key value violates unique constraint" Oct 9, 2018 · From design the save() of Spring Data makes an insert in DB when the element is not present in DB and performs an update when the PK of that element is given. . The behavior we’re doing is more performant. Detail: Key (number)=(CHILD6) already exists. The `MeteoRepositiry just extends `` JPARepository: @Repository. Issue is that name attribute of this object needs to be unique. parent you're saying that the inverse side of the relation is established on the parent prop of the related instance, while it's not true, because if y is x's parent, the x cannot clearly be y's parent at the same time. Apr 20, 2016 · I agree with you on this point, when you set query as: obj, created = UserPermission. SDE_versions'. Postgres autoincrement fields take their values from sequences. } But for some inexplicable reason this fails when a child is already present in the database: Caused by: org. You can try \d <table_name> command in psql interface. sql". Prerequisites: Application written in NestJS + TypeORM in order to connect to PostgresDB. I am importing from the GUI a CSV file into a table. I don't remember exactly how the sequence is handled in postgres but it's documented anyway. values(data) . Jan 17, 2013 · This 3rd party app I am using some how fails to have a migration file that removes an originally specified unique=True. At seemingly random times we get an exception "postgresql duplicate key violates unique constraint. Oct 30, 2019 · This is currently expected behavior from TypeORM. execute() But when i run this i get this error: QueryFailedError: duplicate key value violates unique constraint: "PK_*****" This happened when i upgraded typeorm to the latest version. The key is the SQL statement: SELECT setval ('tablename_id_seq', (SELECT MAX (id) FROM tablename)+1); Please use a readable formatting. save(m1); This works well. Detail: Key (b_name)=(someName) already exists. SaveChangesAsync(cancellationToken); These two approaches will help EF Core to know that the row department with that specified primary key already exist, and track the existing from database instead of inserting new one. I set the column id is autoIncrement: true, don't understand why this happens the max id of columns is 647 but now I cannot insert a record in this table. createQueryBuilder() . I have entity with unique field. To my surprise sometimes I get a. 2') May 2, 2022 · And for FOREIGN KEY constraints: The referenced columns must be the columns of a non-deferrable unique or primary key constraint in the referenced table. I tried to save an entity A which has another entity B with a unique field name by spring-data. All) private Collection<Profession> professions; // getters and setters. Aug 9, 2021 · With the unique constraint, we can ensure that the values in the column are unique across all of the rows in the table. TypeORM re-synchronize the DB. pg_get_constraintdef(co. public interface MeteoRecordRepository extends JpaRepository<MeteoRecord, Long> {. errors. Previously i was using this syntax: Feb 24, 2023 · QueryFailedError: duplicate key value violates unique constraint Typeorm Load 4 more related questions Show fewer related questions 0 May 10, 2019 · Indeed an issue, calling . Jul 15, 2021 · 1. Apr 30, 2024 · I tried @Unique('constrain_name', ['field']) but it didn't help @Column({ unique: true }) I made unique in this method too, but I could not change the constrain name node. If the update changes row by row, each of a time, then it might break. id already exists. Jun 25, 2014 · Obviously, from the message, you are trying to insert a value in a column that already exists there. According to the documentation if you have multiple @PrimaryColumn() decorators you create a composite key. daqa_id_seq':: When trying to upsert an entity to a Postgresql DB, I get a QueryFailedError: duplicate key value violates unique constraint . Used SW versions: Linux Unbuntu: 18. Please give me leads. Jun 15, 2021 · When trying to upsert an entity to a Postgresql DB, I get a QueryFailedError: duplicate key value violates unique constraint. It seems you have a user with the same lower user name as one that currently exists in your backup file. (SQL: insert into "lkp_locations" ("tex If I Replay the XHR ,the ID is increased, until I have an ID available ,and then the value is stored. Of course, I'm excluding the auth table. The PrimaryGeneratedColumn decorator should allow you to enter the name. save(models) and the Model class has a unique constraint it won't save anything, is there anyway to just ignore duplicates and still mass save the rest. x. I confirm this issue does not contain any sensitive information. Apr 10, 2020 · org. Cannot insert duplicate key in object 'dbo. I can succesfully create migrations but when I tried to run it throws error: query failed: ALTER TABLE "post" ADD CONSTRAINT "FK_f36f38b0231a9075541aae12b73" FOREIGN KEY ("user_posted_id") REFERENCES "user" ("id") ON DELETE NO ACTION ON Apr 3, 2018 · updatedAt: Date; } In this case typeORM ended up generating unique key constraint on roleId in users table which prevents to have multiple users with same roleId and is against the requirement a role can belongs to multiple users. Let me explain why this happens. import { Injectable } from '@nestjs/common'; import { registerDecorator, ValidationArguments, ValidationOptions, ValidatorConstraint, ValidatorConstraintInterface, } from 'class-validator'; import { DataSource } from 'typeorm'; Jul 28, 2015 · 1. 1. Mar 9, 2022 · to gain points, level up, and earn exciting badges like the new Dec 1, 2020 · CREATE TABLE foo ( id uuid NOT NULL primary key seq integer NOT NULL, CONSTRAINT seq_key UNIQUE (seq) deferrable initially immediate --<< this ); By declaring the constraint as deferrable it will be checked at the end of the UPDATE statement (to be more precise: at the end of the transaction) rather than row-by-row. If B already exists in DB, then an exception "duplicate key value violates unique constraint "b_name_key" will be thrown. demand'. PSQLException: ERROR: duplicate key value violates unique constraint "childs_pkey". Jun 23, 2021 · The save() method check if columns with PrimaryColumn() decorator contains values to determine whether to update or insert the record. 04. This is one of the reasons why identity columns are preferred over using a sequence and a default value. If the update is made in the right order (starting from the minimum number), the update would work. flush(); return obj; } But then I get this exception: Caused by: org. Detail: Key (id)=(1680) already exists. setting. According to the documentation, the save method should not have any problems UPDATING the model. conname as constraint_name, pg_catalog. postgresql. using System; using System. device. – user330315. some() function over all database objects to check if i can enter this new value but its probably very unoptimal. By saying category => category. Save on the Device entity will attempt to Insert DeviceSetting relation even if it was previously set in the model, rather than do nothing, it well attempt to insert the previous relation generating duplicate key value violates unique constraint as UQ device_setting. x (or put your version here) Hello. Unique indexes for the write tables. setDescription(“fake”); m1. Nov 7, 2019 · sqlalchemy. I have created the following table: CREATE TABLE jira_tickets. Nov 18, 2022 · await _dbContext. kind/bug. Oct 14, 2017 · But if you do not specify the id or unique set of fields, the save method can't know you're refering to an existing database object. CustomUserCreationForm'}, but unfortunately I still get the same error: duplicate key value violates unique constraint "accounts_customuser_username_key" DETAIL: Key (username)=() already exists. Nov 16, 2016 · I think maybe the issue has something to do with too quickly adding/removing constraints. PSQLException: ERROR: duplicate key value violates unique constraint "details_pkey" Detail: Key (details_id)=(8) already exists. We rely on attempting to insert and on conflict, ignore. ERROR: duplicate key value violates unique constraint Apr 4, 2016 · public T save(T obj) { // The T in this case is MainDetails entityManager. Even though there are no such combination. Assignees. Therefore, try to delete all the tables and/or rows that are affecred and then restart the application. it should have been: @Column(unique = true) private String name; @ManyToMany(cascade = CascadeType. When I run with dbeaver, it adds the new row and generates the id with no issue my_table(mt_version) values ('0. ts Custom validation decorators. BooleanField(default=False) Dec 2, 2019 · This can happen if you force the values of auto primary keys. py dumpdata --natural-foreign --exclude=contenttypes --exclude=auth --> data. IntegrityError: if exception_due_to_duplicate_key: do_something() except: do_something_else() Jan 14, 2022 · It works well for first message but when I try to save again with updated endTime, I get. Feb 14, 2019 · 2. forms. Hi I have a program here that stores the checked values in checkedlistbox to database. Read more > May 2, 2016 · The id field in your ny_stations table does not seem to be defined as a serial, so it is expected that pg_get_serial_sequence will return nothing. PSQLException: ERROR: duplicate key value violates unique constraint "b_pkey" Detail: Key (b_id)=(2) already exists. I am making a table for an email with Nestjs, MySQL, and Typeorm. In a nutshell you can do the following: INSERT INTO ticket(id, name,seat) VALUES (nextval('hibernate_sequence'), 'Phantom of the Opera','11A') answered Mar 8, 2022 at 17:25. py sqlsequencereset inventory Piping the python manage. One such approach is in Naming conventions in SQL. Jan 2, 2024 · Duplicate key value violates unique constraint "b_name_key" after save @ManyToOne entity by Spring-boot, Spring-data, Hibernate 1 ERROR: duplicate key value violates unique constraint Oct 21, 2023 · I've already found this question postgresql duplicate key violates unique constraint where it says that happens due the sequence is outdated and the solution is to set the next value of the sequence to the next MAX value of the primary key plus one, but since I declare the primary key as an IDENTITY I'm not able to use the answer of that May 12, 2021 · rg. ' The name column does not have a unique constraint in either table, and I checked using: SELECT pg_get_indexdef(oid) FROM pg_class WHERE relname = 'tableNameBuffer_key' which gives the following: Apr 13, 2019 · Duplicate key value violates unique constraint after saving @ManyToOne entity. The default is good enough. It may be convenient to you to use the table name instead of index name: Aug 17, 2022 · await dataSource . In dbeaver table users_role have constraint uk_d9najy24fium4vkivgwjuf0hw with type UNIQUE_KEY, so that's the problem, but how to change type to non-unique? Many users may have same role, so it is necessary for me Oct 10, 2019 · here is my new solution. I know i can just create a . For example: @Entity({ name: 'persons'}) export class Person { @PrimaryColumn() id: number @Column() name: string @Column() age: number } Now assuming you passed the following person entity to save() May 18, 2018 · public interface ChildRepository extends JpaRepository<Child, String> {. here is migrate code : ERROR: duplicate key value violates unique constraint "uk_d9najy24fium4vkivgwjuf0hw" Detail: Key (roles_id)=(2) already exists. exc. The combination of the composite key columns must be unique (in your above '1' + '1' + '1' = '111' vs '2' + '1' + '1' = '211' ). Why would Postgres attempt to use that primary key again? Or, is this most likely my application (or Django's ORM) causing this? Jul 3, 2021 · Note that this is not really a bug in typeorm but a problem with the usage of bigint datatype. We ran into a unique situation where one of the user came back saying that they are running into following error: postgresql duplicate key violates unique constraint Apr 17, 2022 · ERROR: duplicate key value violates unique constraint "my_table_version_pkey" DETAIL: Key (puck_firmware_version_id)=(66) already exists. Oct 26, 2018 · duplicate key value violates unique constraint \"AuthoriseDates_pkey\" Key (id)=(371) already exists. 1 DB to RDS v10. setStartTime(“2022-01-03T12:05:00”) messageRepository. Sep 25, 2013 · Problem Overview. The INSERT 0 1 depicts that one row was inserted successfully. IntegrityError: duplicate key value violates unique constraint because of the save method. You can define multiple columns as one unique constraint: @Unique(["firstName", "secondName"]). I have even tried changing the database, running manage. Mar 19, 2019 · When that same record is attempted to be inserted again, the unique constraint is not met and as expected the record is not inserted. Jan 16, 2019 · When I try to save new parent object, all child objects get created, but once I try to save it again, postgresql log doesn't show that update query was executed for nested objects instead it tries to insert same objects and I get: error: duplicate key value violates unique constraint "stops_pkey" QueryFailedError: duplicate key value violates Jun 26, 2013 · 1. But now when any of the employee in our company (or myself) save the Timesheet, we get the following errors: *duplicate key value error: duplicate key value violates unique constraint "PK_a31902f392f3b79924f6e39649a" It all works properly when I have a "proper" ManyToMany relationship handled by TypeORM. I have searched too much &; landed to a solution by @burt be Mar 31, 2018 · ERROR: duplicate key value violates unique constraint "pk_machine" DETAIL: Key (id, seq)=(cat-2, 0) already exists. As mentioned before, I run the code below to get the SQL command to reset the id-s: python manage. Labels. First I had to do: VACUUM FULL table_name Then find duplicate rows, delete them, and rebuild the indices. BaseEntity: No; When an entity has a OneToOne relationship, TypeORM will create a unique index for the foreign key column. Oct 9, 2020 · A short description of the code: User can create a category. nspname as schema_name, co. py dbshell to the shell was not working Feb 24, 2020 · SQLSTATE [23505]: Unique violation: 7 ERROR: duplicate key value violates unique constraint "lkp_locations_pkey"↵DETAIL: Key (id)= (1) already exists. I have a following enum that I want to create: When I try to execute that code, I get: Detail: Key (enumtypid, enumlabel)=(33404, 1) already exists. UniqueViolation) duplicate key value violates unique constraint "model_name_key" DETAIL: Key (name)=(a) already exists. I know I could loop over them and save 1 by 1 but this is sooooo much slower. conrelid::regclass as table_name, co. save() except MyModal. They can then press 'follow' on a category and then they are saved to a database. DETAIL: Key (user_id)=(1) already exists. PSQLException: ERROR: duplicate key value violates unique constraint "meteo_record_pkey". insert() . id serial PRIMARY KEY, title text UNIQUE. According to other questions ( here and here) it's possible to catch unique key violations in Entity Framework 6 by catching the thrown exception and inspecting it's InnerException. util. user_id Sep 12, 2022 · I have got a function in a service that needs to get a value of a new or already existing object from the database and save it. Could be a bug but probably my misunderstanding of something. Try to remove id fields from your seed. The problem is I always encounter an exception saying "duplicate key value violates unique constraint pk_famcon. The primary key for the Poles table is the ObjectID. Apr 12, 2022 · Resetting the key manually as suggested at postgresql duplicate key violates unique constraint is not an option since the composite key is a natural key formed by timestamp and ids which have a meaning. add a file name is-unique. The problem in this case is happening when the PK is present. The table looks like Feb 19, 2020 · 'ERROR: duplicate key value violates unique constraint "tableNameBuffer_name_idx" DETAIL: Key (name)=(data) already exists. By default, database drivers serialize bigint values as string values, so the equality check of typeorm will fail and thus an insert statement is triggered. – Feb 15, 2024 · The above query incorrectly throws ERROR: duplicate key value violates unique constraint "test_id_key" in YB. 3. Feb 20, 2015 · While submitting the POST request, it gives me: duplicate key value violates unique constraint "users_userprofile_user_id_key". Map<ModificareInregistrare>(request Mar 9, 2022 · id int PRIMARY KEY, name varchar(20) ); CREATE TABLE. May 11, 2020 · Hi @FreeSoftwareServers . Second way, you can also solve it by this. Most probably your sequence got out of sync caused by other statements. The issue is that TypeOrm is trying to set the next id value that he insert "himself". With PostgreSQL, we can also expect a group of columns to have a unique value. The duplicate key value is (58b1b016-54ed-477d-95e0-61a0f3fb3a61). ERROR: duplicate key value violates unique constraint “message_pkey” Steps: I tried: Message m1 = new Message(); m1. VALUES (1,'AWS Blog1'); INSERT 0 1. So May 29, 2017 · 8. So upserting with typeORM is : let contraption = await thingRepository. I currently have a simple case : Receiving "QueryFailedError: duplicate key value violates unique constraint "pg_type_typname_nsp_index" error on TypeORM Oct 18, 2023 · `QueryFailedError: Error: Violation of PRIMARY KEY constraint 'PK_2e27cd7b3d79c50d197cb0b3924'. get_or_create( user=user, boolean_field=boolean_field) The boolean field is False, it will always try to create object and raise: duplicate key value violates unique constraint because you have defined boolean_field=models. " I already tried other alternatives but it would always end up on this excpetion. In order to assert a constraint, the easiest way is to DROP CONSTRAINT IF EXISTS it and re-add it. tableA also references (has foreign key column) to tableB which was not changed in any Dec 9, 2019 · I have many to one relation with typeorm constructed like this: In PostEntity Class. Dec 26, 2022 · 1. I am trying to save passing this unique key. The duplicate key value is (Poles, DBO). For the Primary key, the name should be in the format PK_. Jul 31, 2017 · Inserted new constraint: ALTER TABLE tableA ADD CONSTRAINT constraint UNIQUE (col1, col2); Now get: ERROR: duplicate key value violates unique constraint "constraint". Works just fine in Postgres. This means you may need to first verify this conflict and resolve it before proceeding any further. Key (col1, col2)=(123, "Monday") already exists. Oct 11, 2021 · My environment is basically an API backed by Postgres. 7, PostgreSQL 9. 2. postgres => INSERT INTO blog. ba zn wd tc xi lp fr gv jf wk