How To Fix SABP_KEY_REDUNDANCY023 - The components of &2 are a subset of &1

SAP Error Message - Details

• Message type: E = Error

• Message class: SABP_KEY_REDUNDANCY - Superfluous Keys Messages

• Message number: 023

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

What causes this issue?

The unique table keys &V1& and &V2& have different types (SORTED and
HASHED). The components of &V2& are a subset of &V1&. Check whether both
keys are required.
INCLUDE INCL_MIGRATION_SCENARIO
If &V1& is a HASHED key, there is a genuine subset of its components
that is already unique. If &V1& is a SORTED key, there is a genuine
initial part that is already unique.
Remove the superfluous components from the key &V1&. The key is then
redundant to the key &V2&. Check whether only one of the two keys is
used or whether only one key is needed and therefore the other can be
removed.

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?

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_REDUNDANCY023 - The components of &2 are a subset of &1 ?

  The SAP error message SABP_KEY_REDUNDANCY023 indicates that there is a redundancy issue with the components of a particular object in the system. Specifically, it means that the components of the object identified by &2 are a subset of the components of another object identified by &1. This typically occurs in the context of SAP's Bill of Materials (BOM) or similar structures where components are defined.
  Cause:
  The error arises when you attempt to create or modify a BOM or a similar structure where the components of one BOM (or object) are entirely contained within another BOM. This redundancy can lead to confusion in the system regarding which components should be used, as they are not distinct.
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Review the BOMs/Objects: Check the components of both objects (&1 and &2). Identify the components of &2 that are also present in &1.
  
  
  Modify the Components: 
  
  If &2 is intended to be a distinct BOM or object, consider modifying its components to ensure that they are not a subset of &1.
  Alternatively, if &2 is meant to be a variant or a specific configuration of &1, you may want to reference &1 directly instead of creating a new object.
  
  
  
  Delete Redundant Entries: If the components of &2 are not needed as a separate entry, you can delete or deactivate &2 to eliminate the redundancy.
  
  
  Consult Documentation: Review SAP documentation or guidelines related to BOM management or the specific module you are working with to ensure compliance with best practices.
  
  
  Check for Custom Logic: If there are any custom developments or enhancements in your SAP system that might be affecting BOM creation or modification, review those as well.
  
  
  Related Information:
  
  Transaction Codes: You may use transaction codes like CS01 (Create BOM), CS02 (Change BOM), and CS03 (Display BOM) to manage BOMs.
  SAP Notes: Check SAP Notes for any known issues or patches related to BOM management that might address this error.
  SAP Community: Engage with the SAP Community forums for insights from other users who may have encountered similar issues.
  
  By following these steps, you should be able to resolve the error and ensure that your BOMs or objects are correctly defined without redundancy.