How To Fix GG620 - The foreign key definition for data field & contains errors

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 620

• Message text: The foreign key definition for data field & contains errors

What causes this issue?

The table definition for table &V2& is incorrect. The error refers to
value field &V1&.
Possible errors:
a) The dependency factor of the foreign key is not 'OPT'.
b) The cardinality of the foreign key is not 'CN'.

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?

Please define the foreign key for value field &V1& according to the
above information.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message GG620 - The foreign key definition for data field & contains errors ?

  The SAP error message GG620 indicates that there is an issue with the foreign key definition for a data field in your database table. This error typically arises during the creation or modification of database tables or when trying to activate a data dictionary object (like a table or view) that has foreign key relationships defined incorrectly.
  Causes of Error GG620
  
  
  Incorrect Foreign Key Definition: The foreign key may reference a non-existent primary key or a field that does not match the data type or length of the primary key it is supposed to reference.
  
  
  Inconsistent Data Types: The data types of the foreign key field and the referenced primary key field must match. If they do not, this error will occur.
  
  
  Missing Primary Key: The table that the foreign key is referencing may not have a primary key defined, or the primary key may have been deleted or modified.
  
  
  Field Length Mismatch: The length of the foreign key field must match the length of the primary key field it references.
  
  
  Referential Integrity Violations: If there are existing records in the table that violate the foreign key constraint, this can also lead to errors.
  
  
  Solutions to Error GG620
  
  
  Check Foreign Key Definition: Review the foreign key definition in the data dictionary (SE11) to ensure that it correctly references an existing primary key in the target table.
  
  
  Verify Data Types: Ensure that the data types of the foreign key and the referenced primary key are the same. If they are different, modify the data types accordingly.
  
  
  Ensure Primary Key Exists: Confirm that the table being referenced has a primary key defined. If it does not, you will need to create one.
  
  
  Check Field Lengths: Make sure that the lengths of the foreign key and primary key fields match. Adjust the lengths if necessary.
  
  
  Data Consistency: If there are existing records that violate the foreign key constraint, you may need to clean up the data to ensure referential integrity.
  
  
  Re-activate the Object: After making the necessary corrections, try to activate the data dictionary object again.
  
  
  Related Information
  
  
  Transaction Codes: You can use transaction codes like SE11 (Data Dictionary), SE14 (Database Utility), and SE80 (Object Navigator) to manage and troubleshoot database objects.
  
  
  Documentation: Refer to SAP Help documentation for detailed information on foreign key constraints and data dictionary management.
  
  
  Debugging: If the issue persists, consider using the ABAP debugger to trace the execution and identify where the foreign key definition is failing.
  
  
  By following these steps, you should be able to resolve the GG620 error and ensure that your foreign key definitions are correctly set up in your SAP system.