Error
Error Code:
42P04
PostgreSQL Error 42P04: Database Already Exists
Description
This error indicates that you attempted to create a new database with a name that is already in use by an existing database within your PostgreSQL instance. It's a syntax error or access rule violation because database names must be unique.
Error Message
duplicate database
Known Causes
3 known causesDatabase Name Already Exists
You tried to create a database using a name that is already assigned to another database in the PostgreSQL server.
Script Re-execution
A database creation script was run multiple times without first dropping the database or verifying its non-existence, causing a re-creation attempt.
Misunderstanding Existing Databases
An attempt was made to create a database with a name that was mistakenly believed to be available, but it actually corresponds to an existing database.
Solutions
Coming SoonDetailed step-by-step solutions for this error are being prepared. In the meantime, try these general troubleshooting tips:
General Troubleshooting Tips
- Check the error message carefully for specific details
- Review recent changes that might have caused the error
- Search for the exact error code in the official documentation
- Check log files for additional context
- Try restarting the application or service