How To Fix CN843 - Business areas activity & and WBS element & are not identical

CN843 - Overview

• Message type: E = Error

• Message class: CN - Meldungen für Netzpläne

• Message number: 843

• Message text: Business areas activity & and WBS element & are not identical

What causes this issue?

You have changed the business area of the activity.

System Response

A material component kept in either sales order stock or project stock
is allocated to this activity. This means that the component quantity
is tracked in the project stock for the WBS element to which the
activity is assigned. The component value is tracked in the activity.
The business areas of the activity and the WBS element must agree so
that the business area balances which the company code requires can be
created.
&WHAT_TO_DO_&
Change the business area back.

Error message extract from SAP system. Copyright SAP SE.

CN843 - Details

• The SAP error message CN843 indicates that there is a mismatch between the business area and the Work Breakdown Structure (WBS) element in a transaction. This error typically occurs when you are trying to post costs or create a transaction that involves both a business area and a WBS element, but they do not match in terms of their assigned business area.
  
  Cause:
  
  Mismatched Business Areas: The business area assigned to the cost center or internal order does not match the business area assigned to the WBS element.
  
  Configuration Issues: There may be configuration settings in the system that are not aligned, leading to this mismatch.
  Data Entry Errors: Incorrect data entry when assigning business areas to cost objects or WBS elements.
  
  
  Solution:
  
  
  Check Business Area Assignments:
  
  Verify the business area assigned to the WBS element. You can do this by navigating to the WBS element in the SAP system and checking its master data.
  Ensure that the