Error
Error Code:
4099
MySQL Error 4099: Trigger Already Exists
Description
This error indicates an attempt to create a database trigger with a name that is already in use for the specified table. It typically occurs when executing a `CREATE TRIGGER` statement for a trigger that has previously been defined, preventing the new trigger from being created.
Error Message
Trigger '%s' already exists on the table '%s'.'%s'.
Known Causes
3 known causesAccidental Re-execution
A `CREATE TRIGGER` statement was executed multiple times, either manually or via a script, without checking for the trigger's prior existence.
Non-Idempotent Deployment Script
A database deployment script or migration tool attempts to create a trigger that was already deployed in a previous run, lacking idempotent checks.
Naming Conflict
An attempt was made to create a new trigger using a name that is already assigned to another trigger on the same table.
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