Error
Error Code:
3008
MySQL Error 3008: Foreign Key Cascade Depth Exceeded
Description
MySQL Error 3008 indicates that an `ON DELETE CASCADE` or `ON UPDATE CASCADE` operation has attempted to traverse a chain of foreign key relationships that exceeds MySQL's internal maximum depth limit. This typically occurs in databases with highly interconnected tables where a single delete or update action triggers a recursive sequence of operations that goes too deep.
Error Message
Foreign key cascade delete/update exceeds max depth of %d.
Known Causes
3 known causesDeeply Nested Foreign Key Relationships
Your database schema has a design where tables are linked by foreign keys with cascade actions forming a very long, linear dependency chain.
Self-Referencing Tables with Cascade
A table with a foreign key that references itself (e.g., parent-child hierarchy) configured with `ON DELETE CASCADE` can quickly hit the depth limit when deleting a root-level entry.
Complex Interdependent Data Model
While not a simple linear chain, a complex web of interdependent tables with cascade rules can lead to paths that exceed the maximum allowed recursion depth during an operation.
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