Database Migration Rollback Fails After Cursor Changes
After Cursor generated new database migration files, attempting to roll back to a previous version fails with syntax errors or constraint violations. The database is left in an inconsistent state.
The down migration (rollback) may be malformed or incompatible with the current schema.
Error Messages You Might See
Common Causes
- Down migration uses incorrect column names that don't match up migration
- Foreign key constraints prevent dropping columns in rollback
- Rollback migration missing proper error handling or transaction wrapping
- Index names or constraint names don't match between up and down
- Rollback attempts to drop non-existent columns or tables
How to Fix It
Verify down migrations are exact reverses of up migrations. Wrap in transactions: BEGIN; ... ROLLBACK;. Check column/index names match. Test rollback on development database first. Use DROP IF EXISTS for safety.
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Get HelpFrequently Asked Questions
How do I manually fix a failed migration?
Connect to DB and manually run the down migration SQL. Update migration table to mark migration as reverted.
Can I edit a migration after it's run?
No. Create a new migration to fix the issue. Never edit run migrations.