How To Fix DT311 - Changed foreign key &-& is still used in:

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 311

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

What causes this issue?

A foreign key that was used in the definition of an aggregate (view,
matchcode, lock object) has been changed.
The aggregates affected by this change are listed in the log lines that
follow. It may be necessary to move to a higher log level to display
this list.

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?

Check whether you need to adjust the aggregates. At the time of a
Release upgrade, these aggregates are generally included in the
transport request.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message DT311 - Changed foreign key &-& is still used in: ?

  The SAP error message DT311 indicates that a foreign key relationship has been changed, but there are still existing references to that foreign key in the database. This typically occurs when you attempt to modify a foreign key constraint in a way that is not compatible with existing data or relationships.
  Cause:
  
  Foreign Key Modification: You may have attempted to change the definition of a foreign key (e.g., changing the referenced table or field) while there are still records in the database that rely on the old foreign key definition.
  Data Integrity Violation: The existing data may violate the new foreign key constraints, meaning that there are records that would no longer be valid if the change were applied.
  Dependent Objects: There may be dependent objects (like views, indexes, or other foreign keys) that are still using the old foreign key definition.
  
  Solution:
  
  Identify Dependencies: Use transaction codes like SE11 (Data Dictionary) or SE14 (Database Utility) to check for any dependent objects or references to the foreign key that you are trying to change.
  Remove or Update References: Before making changes to the foreign key, you may need to either delete or update the records that are still using the old foreign key definition. This may involve:
  
  Deleting records that reference the old foreign key.
  Updating records to point to valid foreign key values that comply with the new definition.
  
  
  Adjust Foreign Key Definition: Once all dependencies and references are resolved, you can proceed to change the foreign key definition.
  Check for Data Integrity: After making changes, ensure that the data integrity is maintained and that there are no orphaned records or violations of the new foreign key constraints.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SE11 (Data Dictionary), SE14 (Database Utility), and SE37 (Function Module) to help you analyze and resolve the issue.
  Documentation: Review SAP documentation or help files related to foreign key constraints and data integrity to understand the implications of changing foreign keys.
  Testing: Always test changes in a development or test environment before applying them to production to avoid data integrity issues.
  
  If you continue to face issues, consider reaching out to your SAP Basis or ABAP team for further assistance, as they may have additional tools or insights to help resolve the error.