How To Fix WXP664 - Purch. grp &1 is not the same as purc. grp &2 from interface &3

WXP664 - Overview

• Message type: E = Error

• Message class: WXP - Retail Planning

• Message number: 664

• Message text: Purch. grp &1 is not the same as purc. grp &2 from interface &3

What causes this issue?

You tried to create an allocation table in manual planning. In doing
so, you entered purchasing group &V2& in interface &V3&. You can,
therefore, use purchasing group &V1& as a planning characteristic.

System Response

The allocation table could not be created.

How to fix this error?

Remove the deviation.

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.

WXP664 - Details

• Certainly! Here's a detailed explanation for the SAP error message:
  
  SAP Error Message:
  WXP664 Purch. grp &1 is not the same as purc. grp &2 from interface &3
  
  Meaning / 
  Cause:
  This warning message occurs when there is a mismatch between the purchasing group assigned in the current document (e.g., purchase order, contract) and the purchasing group coming from an external interface or system (such as an IDoc, BAPI, or another integration interface).
  
  Purchasing Group &1: The purchasing group currently maintained in the SAP document.
  Purchasing Group &2: The purchasing group received from the external interface.
  Interface &3: The name or type of the interface (e.g., IDoc type, BAPI name).
  
  The system detects that the purchasing group in the document does not match the purchasing group provided by the interface, which could indicate inconsistent or conflicting data.
  
  Common Causes:
  
  Data inconsistency between SAP and the external system sending the data.
  Manual changes in SAP after the interface data was received.
  Incorrect mapping