Error
Error Code:
351
SAP S/4HANA Error 351: Column Referenced in Constraint
Description
Error 351, ERR_SQL_DROP_MULTI_COL_UNIQUE, indicates an attempt to drop or alter a database column that is an active participant in a multi-column unique constraint. The database system prevents this operation to maintain data integrity and ensure the defined uniqueness rule remains valid. This error typically occurs during schema modification or database migration processes.
Error Message
ERR_SQL_DROP_MULTI_COL_UNIQUE
Known Causes
3 known causesDirect Column Drop
An attempt was made to drop a column using a SQL DROP COLUMN statement without first removing or altering the multi-column unique constraint that references it.
Schema Modification Tool Issue
Using a database management tool or application that attempts to modify a table schema by dropping a column without automatically managing its associated multi-column unique constraints.
Flawed Migration Script
A database migration script or transport request was executed that included an operation to drop a column which is still part of an active multi-column unique constraint.
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