How To Fix SABP_KEY_REDUNDANCY018 - The components of &1 are a subset of &2

SAP Error Message - Details

• Message type: E = Error

• Message class: SABP_KEY_REDUNDANCY - Superfluous Keys Messages

• Message number: 018

• Message text: The components of &1 are a subset of &2

What causes this issue?

The table key &V1& is unique and &V2& is not unique. However, the
components of &V1& are a subset of &V2&, which means that &V1& is more
selective than &V2&.
INCLUDE INCL_MIGRATION_SCENARIO
Check whether both keys are really needed or if one of the keys can be
removed.
The message is also issued if &V2& is a generic primary key whose
uniqueness is unknown. In this case, the worst case scenario is assumed
(that the primary key is not unique). However, since the unique
secondary key is a subset of the primary key at the same time, the
primary key must be unique. Check the definition of the primary key and
define it as unique if appropriate.

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

System Response

How to fix this error?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message SABP_KEY_REDUNDANCY018 - The components of &1 are a subset of &2 ?

  The SAP error message SABP_KEY_REDUNDANCY018 indicates that there is a redundancy issue with the components of a particular object. Specifically, it means that the components of the object identified by &1 are a subset of the components of another object identified by &2. This typically occurs in the context of SAP Business Application Programming (ABAP) or when dealing with data structures that have overlapping or redundant definitions.
  Cause:
  The error arises when:
  
  You are trying to create or modify a data structure (like a BOM, routing, or variant configuration) where the components defined for one object are already fully included in another object.
  This can happen during the creation of a new object or when trying to assign components to an existing object that already contains those components.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Review the Components: Check the components of both objects (&1 and &2). Identify which components are causing the redundancy.
  
  
  Modify the Object: 
  
  If you are trying to create a new object, consider whether you need to include all the components from &1 or if you can reference &2 instead.
  If you are modifying an existing object, remove the redundant components from &1 that are already included in &2.
  
  
  
  Use Transaction Codes: Depending on the context of the error, you may need to use specific transaction codes to view or modify the objects involved. For example, if this is related to BOMs, you might use transaction CS01 (Create BOM) or CS02 (Change BOM).
  
  
  Consult Documentation: Review SAP documentation or help resources related to the specific module you are working with to understand the structure and relationships of the objects involved.
  
  
  Seek Help from SAP Support: If you are unable to resolve the issue, consider reaching out to SAP support or your internal SAP team for further assistance.
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional context.
  Data Structure Relationships: Familiarize yourself with how different data structures relate to one another in your specific SAP environment, as this can help prevent similar issues in the future.
  Testing: After making changes, ensure to test the modifications in a development or test environment before moving to production.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it.