How To Fix KO159 - Settlement fields are maintained in the order -> display only

KO159 - Overview

• Message type: E = Error

• Message class: KO - Master data for CO orders

• Message number: 159

• Message text: Settlement fields are maintained in the order -> display only

What causes this issue?

You have maintained the fields 'Settlement Cost Element' and either
'Cost Center' or 'G/L Account' in the 'Settlement to One Receiver' group
box in your order master.

System Response

The system automatically created a settlement rule specifying 100%
settlement to the appropriate receiver.
Once this is done, however, you can only display the settlement rule,
you can no longer maintain it manually.

How to fix this error?

If you want to create a settlement rule manually, you first have to
delete the contents of the 'Settlement Cost Element', 'Cost Center, and
'G/L Account' fields in the 'Settlement to One Receiver' group box for
the internal order master data.

Error message extract from SAP system. Copyright SAP SE.

KO159 - Details

• The SAP error message KO159 ("Settlement fields are maintained in the order -> display only") typically occurs in the context of controlling (CO) when working with internal orders. This message indicates that the settlement fields for the order have been set in a way that they can only be viewed and not modified. Here’s a breakdown of the cause, potential solutions, and related information:
  
  Cause:
  
  Order Status: The internal order may be in a status that does not allow changes to settlement fields. For example, if the order has already been settled or if it is in a closed status, the system will restrict modifications.
  Field Configuration: The settlement fields may have been configured in such a way that they are set to display only. This can happen due to settings in the order type or the configuration of the controlling area.
  Authorization Issues: The user may not have the necessary authorizations to change