How To Fix DT308 - Foreign key &-& is extended generically

SAP Error Message - Details

• Message type: E = Error

• Message class: DT - Table activation (incl. indexes)

• Message number: 308

• Message text: Foreign key &-& is extended generically

What causes this issue?

The key of a check table was extended by additional key fields. Such a
change is normally passed on to all the foreign keys of this check
table by selecting the new key fields as generic keys.
It is only possible to pass on the change for the foreign keys which
are known during system activation.
There could be tables for which the key extension has to be made known
to the foreign key afterwards, particularly due to transport and
upgrading.

System Response

The foreign key is automatically marked as a generic foreign key in the
new key fields.

How to fix this error?

The message is for information only.
Note that only key extensions are supported here. If you get an error
message that the foreign key is not completely defined, new key fields
were probably inserted between the keys of the check table.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message DT308 - Foreign key &-& is extended generically ?

  The SAP error message DT308 indicates that a foreign key relationship is extended generically. This typically occurs in the context of data dictionary objects, particularly when dealing with table definitions and foreign key constraints in SAP.
  Cause:
  The error message DT308 arises when:
  
  A foreign key relationship is defined in a way that it does not directly reference a specific table or field but instead uses a generic reference. This can happen if the foreign key is defined on a generic data type or if the relationship is not properly specified.
  The foreign key constraint is not properly maintained or is referencing a non-existent or incorrect target field.
  
  Solution:
  To resolve the DT308 error, you can take the following steps:
  
  
  Check Foreign Key Definition:
  
  Go to the Data Dictionary (transaction SE11) and check the foreign key definition for the table in question.
  Ensure that the foreign key is correctly defined and points to the appropriate table and field.
  
  
  
  Modify the Foreign Key:
  
  If the foreign key is defined generically, consider modifying it to point to a specific table and field.
  Ensure that the foreign key relationship is valid and that the referenced table and field exist.
  
  
  
  Check Data Elements:
  
  Verify that the data elements used in the foreign key relationship are correctly defined and do not use generic types that could lead to ambiguity.
  
  
  
  Activate Changes:
  
  After making any changes, make sure to activate the table and the foreign key relationship to ensure that the changes take effect.
  
  
  
  Test the Changes:
  
  After activation, test the changes by attempting to perform the operation that previously triggered the error to ensure that the issue is resolved.
  
  
  
  Related Information:
  
  Transaction Codes: Use SE11 (Data Dictionary) to view and modify table definitions and foreign keys.
  Documentation: Refer to SAP Help documentation for detailed information on foreign key relationships and data dictionary objects.
  SAP Notes: Check for any relevant SAP Notes that may address specific issues related to foreign key constraints and the DT308 error.
  
  If the problem persists after following these steps, consider reaching out to your SAP Basis or ABAP team for further assistance, as they may have additional insights or access to system logs that can help diagnose the issue.