How To Fix MN458 - Condition record number may not be changed in user exit

MN458 - Overview

• Message type: E = Error

• Message class: MN - Message class for subsequent settlement (Purchasing)

• Message number: 458

• Message text: Condition record number may not be changed in user exit

What causes this issue?

The condition record number and item number may not be changed in the
user exit.

System Response

Settlement accounting with respect to the condition record (and thus
for rebate arrangement &V3&) is not possible.

How to fix this error?

The programming in the enhancement LWBON003, function module
EXIT_SAPLWN01_003 of function group XWNX must be changed.
The above data may not be changed in the structure E_SETTLEMENT_VALUES.
If necessary, please contact the person responsible in your enterprise.
The relevant condition record has the (internal) number &V1&, item
number &V2&.

Error message extract from SAP system. Copyright SAP SE.

MN458 - Details

• The SAP error message MN458 ("Condition record number may not be changed in user exit") typically occurs in the context of pricing conditions in SAP, particularly when working with user exits or enhancements that modify condition records.
  
  Cause:
  This error arises when there is an attempt to change the condition record number in a user exit or enhancement. In SAP, condition records are often tied to specific pricing conditions, and changing the record number can lead to inconsistencies in pricing calculations and data integrity. The system is designed to prevent such changes to maintain the integrity of the pricing conditions.
  
  Solution:
  To resolve this error, you should:
  
  
  Review User Exits/Enhancements: Check the user exit or enhancement implementation where the error is occurring. Ensure that there are no attempts to modify the condition record number. If you find such code, it should be removed or modified to avoid changing the record number.
  
  
  Use Correct Logic: If you