How To Fix DT310 - Deleted foreign key &-& is still used in:

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 310

• Message text: Deleted foreign key &-& is still used in:

What causes this issue?

A foreign key used to define a view, matchcode object, or lock object
should be deleted.

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?

From the log lines that follow, you can see the objects in which the
foreign key is still used. (You may have to move to a higher log
level.)
If a different foreign key cannot be used for these objects, you may
not delete the foreign key.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message DT310 - Deleted foreign key &-& is still used in: ?

  The SAP error message DT310 indicates that a foreign key relationship has been deleted, but there are still references to that foreign key in the system. This can occur during database table modifications, such as when a foreign key constraint is removed but the associated data or references still exist in other tables or structures.
  Cause:
  
  Deleted Foreign Key: The foreign key constraint has been removed from the database schema.
  Existing References: There are still existing references in the database that rely on the deleted foreign key, such as entries in dependent tables or structures that expect the foreign key to be present.
  Data Integrity Issues: The deletion of the foreign key may lead to data integrity issues, as the system expects certain relationships to be maintained.
  
  Solution:
  
  Check Dependencies: Use transaction codes like SE11 (Data Dictionary) or SE14 (Database Utility) to check for any dependencies or references to the deleted foreign key. Identify where the foreign key is still being used.
  Update References: If there are tables or structures that still reference the deleted foreign key, you may need to update or remove those references. This could involve:
  
  Modifying the dependent tables to remove or update the references.
  Re-establishing the foreign key if it is still needed for data integrity.
  
  
  Data Cleanup: If the foreign key was deleted intentionally and the references are no longer valid, you may need to clean up the data in the dependent tables to remove any orphaned records.
  Recreate Foreign Key: If the foreign key is still required for maintaining data integrity, consider recreating it in the database.
  Consult Documentation: Review any relevant documentation or change logs to understand why the foreign key was deleted and whether it was part of a larger change.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with transaction codes like SE11 (Data Dictionary), SE14 (Database Utility), and SE80 (Object Navigator) to manage database objects and dependencies.
  Data Dictionary: Understanding the data dictionary and how foreign keys work in SAP can help prevent similar issues in the future.
  Testing: After making changes, ensure to test the system thoroughly to confirm that data integrity is maintained and that no further errors occur.
  
  If the issue persists after following these steps, it may be beneficial to consult with a database administrator or SAP support for further assistance.