PostgreSQL 42P07

Duplicate table - A duplicate table already exists in the database, preventing the creation of a new table with the same name.

How It Affects Your App

The PostgreSQL 42P07 DUPLICATE TABLE error indicates that a table with the same name already exists in the database. This can have a significant impact on an application, as it can prevent the application from creating new tables or modifying existing ones. It can also lead to data corruption, as the application may attempt to write to the wrong table. Additionally, it can cause queries to fail, as the application may attempt to query the wrong table.

How To Fix

1. Identify the source of the error: PostgreSQL 42P07 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. Monitor the database for any future occurrences of the PostgreSQL 42P07 error: An automated database observability tool can be used to monitor the database for any future occurrences of the PostgreSQL 42P07 error. This tool can provide real-time alerts when the error occurs, allowing for quick resolution of the issue. Additionally, the tool can provide detailed insights into the root cause of the error, allowing for more efficient debugging and resolution.

Metis takes your database to the next level

The only way to

your database

Never worry about your
database again!

Start using Metis and get your database guardrails set up in minutes