How To Fix IWO_BAPI136 - The billing form in order &1 cannot be changed

IWO_BAPI136 - Overview

• Message type: E = Error

• Message class: IWO_BAPI - BAPIs for ALM Orders: Messages

• Message number: 136

• Message text: The billing form in order &1 cannot be changed

What causes this issue?

You tried to change the billing form in order &V1&. However, this
change cannot be made, because a sales document is assigned to the
service order or the status of the service order does not allow the
changes.

System Response

The system terminates processing.

How to fix this error?

Check your entries.

Error message extract from SAP system. Copyright SAP SE.

IWO_BAPI136 - Details

• The SAP error message IWO_BAPI136 indicates that the billing form associated with a specific order (denoted by &1) cannot be changed. This error typically arises in the context of billing documents or sales orders when there is an attempt to modify the billing form after it has already been processed or finalized.
  Causes:
  
  Billing Document Status: The billing document may already be in a status that does not allow changes (e.g., it has been posted or is in a completed state).
  Authorization Issues: The user may not have the necessary permissions to make changes to the billing form.
  Configuration Settings: There may be configuration settings in the SAP system that restrict changes to billing forms under certain conditions.
  Document Locking: The document might be locked by another process or user, preventing changes.
  
  Solutions:
  
  Check Document Status: Verify the status of the billing document. If it is already posted or completed, you may need to reverse or cancel