How To Fix DT307 - Foreign key &-& (Field specified despite constant foreign key)

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 307

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

What causes this issue?

In a foreign key a constant was assigned to a field of the check table.
In addition, a field name was specified.

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 DT307 - Foreign key &-& (Field specified despite constant foreign key) ?

  The SAP error message DT307 indicates that there is an issue with a foreign key relationship in your data model. Specifically, it suggests that a field has been specified in a foreign key relationship, even though a constant foreign key is expected. This can occur in various contexts, such as when defining data elements, structures, or database tables.
  Cause:
  
  Incorrect Foreign Key Definition: The foreign key relationship is defined incorrectly, where a field is specified instead of a constant value.
  Data Model Issues: There may be inconsistencies in the data model, such as missing or incorrect references to primary keys.
  Field Type Mismatch: The field types of the foreign key and the referenced primary key may not match, leading to confusion in the relationship.
  Configuration Errors: Errors in the configuration of the data dictionary or the underlying database schema can also lead to this error.
  
  Solution:
  
  Check Foreign Key Definition: Review the foreign key definition in the data dictionary (SE11) to ensure that it is correctly defined. Make sure that you are using a constant foreign key where required.
  Correct Field Specification: If a field is incorrectly specified, change it to the appropriate constant or remove the field specification if it is not needed.
  Verify Data Types: Ensure that the data types of the foreign key and the primary key match. If they do not, adjust the data types accordingly.
  Review Related Tables: Check the related tables to ensure that the primary key exists and is correctly defined.
  Transport Requests: If this error occurs after a transport request, ensure that all related objects have been transported correctly and are in sync.
  Consult Documentation: Refer to SAP documentation or help resources for specific guidance on foreign key relationships and data dictionary definitions.
  
  Related Information:
  
  Transaction Codes: Use transaction codes like SE11 (Data Dictionary), SE14 (Database Utility), and SE37 (Function Module) to investigate and modify the relevant objects.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  Debugging: If necessary, use debugging tools to trace the execution and identify where the error is being triggered.
  Community Forums: Engage with SAP community forums or support channels for additional insights and solutions from other users who may have encountered similar issues.
  
  By following these steps, you should be able to identify the root cause of the DT307 error and implement the necessary corrections to resolve it.