How To Fix DT306 - Foreign key &-& (Field specified despite generic foreign key)

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 306

• Message text: Foreign key &-& (Field specified despite generic foreign key)

What causes this issue?

A foreign key was defined generically. Despite this fact, a field name
was entered.

System Response

The foreign key is corrected at time of activation (the field name is
removed).

How to fix this error?

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

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message DT306 - Foreign key &-& (Field specified despite generic foreign key) ?

  The SAP error message DT306 indicates that there is an issue with a foreign key relationship in your data model. Specifically, it occurs when a field is specified in a foreign key relationship, but the foreign key is defined as a generic foreign key. This means that the system expects a more general reference rather than a specific field.
  Cause:
  
  Generic Foreign Key Definition: The foreign key is defined generically, which means it should not reference specific fields directly.
  Field Specification: A specific field has been specified in the foreign key relationship, which contradicts the generic nature of the foreign key.
  Data Model Configuration: There may be a misconfiguration in the data model or the way the foreign key relationships are set up.
  
  Solution:
  
  Review Foreign Key Definition: Check the definition of the foreign key in the data dictionary (transaction SE11). Ensure that it is defined as a generic foreign key if that is the intended design.
  Remove Specific Field Reference: If the foreign key is meant to be generic, remove any specific field references from the foreign key definition.
  Adjust Data Model: If a specific field is necessary for your application, consider redefining the foreign key to be specific rather than generic.
  Check Related Tables: Ensure that the tables involved in the foreign key relationship are correctly defined and that the fields being referenced exist and are compatible.
  Test Changes: After making adjustments, test the changes to ensure that the error is resolved and that the foreign key relationships function as expected.
  
  Related Information:
  
  Transaction Codes: Use SE11 (Data Dictionary) to view and modify table definitions and foreign key relationships.
  Documentation: Refer to SAP documentation for guidelines on defining foreign keys and understanding the implications of generic versus specific foreign keys.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional context or solutions.
  
  If the issue persists after following these steps, consider reaching out to your SAP support team or consulting with an SAP expert for further assistance.