Error
Error Code:
1558
MySQL Error 1558: System Table Column Mismatch
Description
This error indicates that the internal system tables, specifically those in the `mysql` database, have an incorrect column count compared to what the current MySQL server version expects. It typically occurs after upgrading MySQL to a newer version without properly updating the system tables, or if the server was started with an older data directory.
Error Message
The column count of mysql.%s is wrong. Expected %d, found %d. Created with MySQL %d, now running %d. Please perform the MySQL upgrade procedure.
Known Causes
3 known causesIncomplete MySQL Upgrade
The MySQL server binaries have been updated, but the internal system tables in the `mysql` database have not been upgraded to match the new server version's expected schema.
Mismatching Data Directory Version
A newer MySQL server instance was started using a data directory created by an older MySQL version, leading to incompatible system table structures.
Manual System Table Alteration
Direct, unauthorized modifications were made to the internal `mysql` database tables, corrupting their expected column structure for the current server version.
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