How To Fix 5AT121 - Attribute &1 redefined as subordinate object &2

5AT121 - Overview

• Message type: E = Error

• Message class: 5AT - General Attribute Maintenance

• Message number: 121

• Message text: Attribute &1 redefined as subordinate object &2

What causes this issue?

Attribute &SYST-MSGV1& can only be assigned once within the assignment
hierarchy. However, you have used it several times (in subordinate
object &SYST-MSGV2&).

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?

Make sure that the attribute is only assigned to a single object within
the assignment hierarchy. Either delete the attribute on the current
object, or on subordinate object &SYST-MSGV2&.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

5AT121 - Details

• The SAP error message 5AT121, which states "Attribute &1 redefined as subordinate object &2," typically occurs in the context of the Business Object (BO) modeling or when working with the ABAP Dictionary. This error indicates that there is a conflict in the definition of an attribute within a business object or data structure.
  
  Cause:
  The error arises when an attribute that has already been defined in a business object is being redefined as a subordinate object. This can happen due to:
  
  Duplicate Definitions: The same attribute is defined multiple times in the same context, leading to ambiguity.
  Incorrect Hierarchical Structure: The attribute is being incorrectly assigned as a subordinate object when it should remain as a standalone attribute.
  Modeling Errors: Errors in the modeling of the business object or data structure, such as incorrect relationships or associations.
  
  
  Solution:
  To resolve the error, you can take the following steps:
  
  
  Check Definitions: Review the definitions of the business object and