PostgreSQL 42P06

Duplicate schema name specified. Occurs when attempting to create a schema with a name that already exists.

How It Affects Your App

The PostgreSQL 42P06 DUPLICATE SCHEMA error indicates that a schema with the same name already exists in the database. This can cause issues with the application as it may not be able to access the data it needs, or it may be unable to create new objects in the database. It can also lead to data corruption or data loss if the application attempts to write to the existing schema. In addition, the application may not be able to access the database at all if the schema name is already in use.

How To Fix

1. Identify the source of the error: PostgreSQL 42P06 is a “duplicate key value violates unique constraint” error. This means that a unique value is being inserted into a table that already exists.

2. Check the table definition to ensure that the unique constraint is properly defined:


3. Check the data being inserted to ensure that it is unique:

INSERT INTO my_table (name) VALUES ('John')

4. If the data is not unique, update the existing record instead of inserting a new one:

UPDATE my_table SET name = 'John' WHERE id = 1

5. Use an automated database observability tool to monitor and fix PostgreSQL 42P06 errors. Automated database observability tools can detect and alert on errors like PostgreSQL 42P06, allowing for quick resolution of the issue. Additionally, they can provide insights into the root cause of the issue, helping to prevent similar errors from occurring in the future.

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