How To Fix PPE4191 - &1 is a key in a planning matrix and cannot be deleted

PPE4191 - Overview

• Message type: E = Error

• Message class: PPE4 - Messages from the iPPE Access Object

• Message number: 191

• Message text: &1 is a key in a planning matrix and cannot be deleted

What causes this issue?

The system has determined that the &v1& to be deleted is being used as a
planning matrix key.

System Response

The system does not delete the &v1&.

How to fix this error?

Ensure you really want to delete &v1&. If this is the case, proceed as
follows:
Ensure that the planning matrix for the &v1& to be deleted contains no
orders.
Execute the RPM call, so that the matrix is deleted.
Delete the production data structures for the &v1& and any possible
material variants.
Delete the &v1&.

Procedure for System Administrators

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 PPE4191 - &1 is a key in a planning matrix and cannot be deleted ?

  The SAP error message PPE4191 indicates that you are trying to delete a key in a planning matrix that is currently being used or is defined as a key in the planning matrix. This typically occurs in the context of SAP Advanced Planning and Optimization (APO) or SAP Integrated Business Planning (IBP) where planning matrices are used to manage and analyze planning data.
  
  Cause:
  
  Key Usage: The key you are attempting to delete is actively used in the planning matrix. This means that it is part of the structure that defines how data is organized and analyzed.
  Dependencies: There may be dependencies or relationships tied to the key that prevent its deletion. For example, if the key is linked to certain planning objects, it cannot be removed without addressing those dependencies first.
  Configuration Settings: The planning matrix may have specific configuration settings that enforce the integrity of the keys, preventing deletion to maintain data