How To Fix GG598 - The foreign key cannot be uniquely specified

SAP Error Message - Details

• Message type: E = Error

• Message class: GG - Messages for FI-SL customizing

• Message number: 598

• Message text: The foreign key cannot be uniquely specified

What causes this issue?

Either the foreign key cannot be specified or there are several ways
to define the foreign key. In the latter case, define the foreign key
manually.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message GG598 - The foreign key cannot be uniquely specified ?

  The SAP error message GG598, which states "The foreign key cannot be uniquely specified," typically occurs in the context of database operations, particularly when dealing with foreign key constraints in SAP systems. This error indicates that the system is unable to uniquely identify a foreign key relationship due to issues with the data or the configuration of the database tables involved.
  Causes:
  
  
  Non-Unique Foreign Key Values: The foreign key values in the child table do not uniquely correspond to the primary key values in the parent table. This can happen if there are duplicate entries in the child table that reference the same foreign key.
  
  
  Incorrect Table Relationships: The relationship between the tables may not be correctly defined in the data dictionary. This could be due to missing or incorrectly defined primary keys or foreign keys.
  
  
  Data Integrity Issues: There may be data integrity issues where the data in the child table does not match the expected values in the parent table.
  
  
  Configuration Errors: Errors in the configuration of the database schema or the way the foreign keys are set up can lead to this error.
  
  
  Solutions:
  
  
  Check Data for Duplicates: Review the data in the child table to ensure that there are no duplicate foreign key values that would violate the uniqueness requirement.
  
  
  Verify Table Relationships: Ensure that the foreign key relationships are correctly defined in the data dictionary. Check that the primary key in the parent table is unique and that the foreign key in the child table correctly references it.
  
  
  Data Cleanup: If there are data integrity issues, you may need to clean up the data in the child table to ensure that all foreign key values correspond to valid primary key values in the parent table.
  
  
  Adjust Foreign Key Constraints: If necessary, you may need to adjust the foreign key constraints to allow for the intended relationships. This could involve modifying the database schema.
  
  
  Consult Documentation: Review SAP documentation or consult with your SAP Basis or database administrator for specific guidance related to your system's configuration.
  
  
  Related Information:
  
  Transaction Codes: You may use transaction codes like SE11 (Data Dictionary) to check the definitions of the tables and their relationships.
  Database Logs: Check database logs for more detailed error messages that may provide additional context for the issue.
  SAP Notes: Look for relevant SAP Notes that may address this specific error or provide guidance on best practices for defining foreign keys.
  
  If the issue persists after trying the above solutions, it may be beneficial to engage with SAP support or a technical consultant who can provide deeper insights into the specific configuration and data issues in your system.