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

SABP_KEY_REDUNDANCY018 - Overview

• 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