Error
Error Code:
1091
MySQL Error 1091: Cannot Drop Non-Existent Object
Description
This error indicates that you attempted to remove a database object (such as a column, index, or foreign key) from a table, but MySQL could not find an object with that name. It commonly occurs during schema modifications when the target object has already been dropped or was never created.
Error Message
Can't DROP '%s'; check that column/key exists
Known Causes
3 known causesObject Already Removed
The column, index, or key you are attempting to drop has already been successfully removed in a prior database operation.
Incorrect Object Reference
The name or type specified in the `DROP` statement (e.g., COLUMN, INDEX, FOREIGN KEY) does not match an existing object in the table, often due to a typo or incorrect object type.
Mismatched Table Context
The `DROP` command is being executed against a table or database where the specified column or key does not exist.
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