How To Fix FTR0451 - IDoc status &1 cannot be set (see long text)

FTR0451 - Overview

• Message type: E = Error

• Message class: FTR0 - Treasury: Financial Transaction

• Message number: 451

• Message text: IDoc status &1 cannot be set (see long text)

What causes this issue?

You can only set the following status fields using manual linking:
<ZH>53 </> Application document posted
<ZH>68 </> Error - no further processing
You do not have to set a new status value, which means that the
existing status 51 can stay as it is. This enables you to link the IDoc
with several transactions and only assign 'Completed status' (53, 68)
at the end.

Error message extract from SAP system. Copyright SAP SE.

FTR0451 - Details

• The SAP error message FTR0451 indicates that there is an issue with the IDoc status in the context of financial transactions, particularly related to the integration of IDocs (Intermediate Documents) in the SAP system. The message typically suggests that the IDoc status cannot be set due to certain conditions not being met.
  
  Cause:
  The error can occur due to several reasons, including but not limited to:
  
  IDoc Status Issues: The IDoc may already be in a status that does not allow for the requested operation (e.g., it might be in a status that indicates it has already been processed or is in error).
  
  Configuration Issues: There may be configuration settings in the IDoc processing that are not correctly set up, leading to the inability to change the status.
  Data Integrity Issues: The data contained within the IDoc may not meet the required criteria for processing, leading to a failure in status change.
  Authorization Issues: The user