How To Fix AH844 - Internal: Change of weighting key not allowed

AH844 - Overview

• Message type: E = Error

• Message class: AH - IS-U billing (master data)

• Message number: 844

• Message text: Internal: Change of weighting key not allowed

What causes this issue?

The weighting key for the steps with the following specified partial
key has changed in internal table IOPER.
<DS:DE.CSNO>Schema step during billing</> &V1&
Number of operand &V2&
Operand &V3&
This causes an error during price block adjustment in function module
ISU_PRICE_ZONES_ADJUST.

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?

INCLUDE ISU_SAP OBJECT DOKU ID TX
Specify the partial key in your message.

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 AH844 - Internal: Change of weighting key not allowed ?

  The SAP error message AH844 ("Internal: Change of weighting key not allowed") typically occurs in the context of SAP's Material Management (MM) or Sales and Distribution (SD) modules, particularly when dealing with pricing or valuation methods. This error indicates that there is an attempt to change a weighting key that is not permitted due to the current configuration or status of the document or transaction.
  
  Cause:
  
  Incorrect Configuration: The weighting key may be configured in a way that does not allow changes after certain conditions are met (e.g., after a document is saved or posted).
  Document Status: The document (like a purchase order, sales order, or invoice) may be in a status that does not permit changes to the weighting key.
  Data Consistency: SAP enforces data consistency rules, and changing the weighting key might violate these rules, especially if it affects pricing or valuation calculations.
  
  
  Solution:
  
  Check Document Status: Ensure that the document you are trying