How To Fix KI158 - &1 &2 is already settled; Cancel settlement

KI158 - Overview

• Message type: E = Error

• Message class: KI -

• Message number: 158

• Message text: &1 &2 is already settled; Cancel settlement

What causes this issue?

You want to reverse shipment of order &V2& to storage. However, the
order is already settled to Materials Management.

How to fix this error?

Reverse the settlement before shipment because settlement of the
quantity is used for recalculating material prices. If you do not do
so, the following effects occur:
The ongoing average price is wrong, and thus the material inventory
valuation
The inventory given in the price difference account is wrong
Use "Reverse" in the menu "Settlement" in the order settlement
transaction. You can view earlier settlements in the sub-menu "Extras".
<DS:TRAN.KO88>Reverse settlement</>
This message is a standard warning. You can change it to an error or
information message, or supress it entirely, in the message control
transaction. The message class is KI and the message number is 158. If
you do not specify a user, the setting applies to all users.
<DS:TRAN.OBA5>Set message</>

Error message extract from SAP system. Copyright SAP SE.

KI158 - Details

• The SAP error message KI158 indicates that a particular cost object (like an internal order or a project) has already been settled, and you are attempting to cancel the settlement. This error typically arises in the context of controlling (CO) when dealing with internal orders, projects, or cost centers.
  
  Cause:
  The error occurs because:
  
  The cost object has already undergone a settlement process, meaning that costs have been transferred to another cost object (like a cost center, profitability segment, or asset).
  The system does not allow the cancellation of a settlement that has already been processed, as it could lead to inconsistencies in financial reporting and accounting.
  
  
  Solution:
  To resolve this error, you can consider the following steps:
  
  
  Check Settlement Status: Verify the settlement status of the cost object. You can do this by checking the settlement history in the relevant transaction (e.g., KO03 for internal orders).
  
  
  Reverse the Settlement: If you need to cancel the settlement, you