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postgresql duplicate key violates unique constraint The "duplicate key" error is telling you that the work was not done because it would produce a duplicate key, not that it discovered a duplicate key already commited to the table
Fixing “Duplicate Key Violation” for Primary Keys in PostgreSQL Encountering this error in PostgreSQL? If your table has a primary key column that uses auto-increment (e g , SERIAL or BIGSERIAL) and you see this error while inserting a new row, it means the
Resolving duplicate key value violates unique constraint in PostgreSQL The 'duplicate key value violates unique constraint' error in PostgreSQL can be resolved by identifying and addressing duplicate values, modifying insert statements to handle conflicts, cleaning up existing data, and reviewing application logic
Fixing PostgreSQL Error: Duplicate Key Violations Duplicate key violations occur in PostgreSQL when an INSERT or UPDATE operation attempts to insert or modify a record that would violate a unique constraint, commonly due to a primary key or unique index
How to Fix Duplicate Key Value Violates Unique Constraint in PostgreSQL . . . First, figure out which column is causing the issue The error message usually tells you the constraint name (e g , Accounts_new_pkey1) and the table name (e g , Accounts) Use this to find the column Run this query to inspect the table: Look for the column with the PRIMARY KEY or UNIQUE constraint
Fixing table structure to avoid `Error: duplicate key value violates . . . At a later point some records are inserted without id and they fail with the error: Error: duplicate key value violates unique constraint 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
postgresql - Duplicate key value violates unique constraint in Postgres . . . The problem is that, for some hard-to-discover reason, the sequence associated with the column id does not match the actual contents of the column You can fix it with this one-time intervention: 'teams_id_seq', coalesce(( select id+ 1 from teams order by id desc limit 1), 1), false); Read about Sequence Manipulation Functions