Error
Error Code:
401
SAP S/4HANA Error 401: Unique Constraint Conflict
Description
This error indicates a fundamental conflict in a table's design within SAP S/4HANA. It occurs when a table, explicitly configured for 'insert-only' operations (meaning new rows are always added and existing ones are never modified), also has a unique constraint defined. This design prevents the system from inserting new records if they would violate the uniqueness rule, contradicting the table's append-only nature.
Error Message
ERR_SQL_INSERT_ONLY_TABLE_WITH_UNIQUE: Unique constraint not allowed on insert-only table
Known Causes
3 known causesConflicting Table Design
An insert-only table, typically used for logging, auditing, or historical data, has been inadvertently defined with a unique constraint, which inherently conflicts with its append-only nature if duplicate values are expected over time.
Incorrect Data Model Configuration
A unique index or constraint was applied to a table intended to store multiple, potentially non-unique records over time without updates, leading to a schema inconsistency.
Automated Schema Deployment Error
An automated process, migration script, or system tool incorrectly created or modified the table definition, adding a unique constraint to an insert-only table.
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