Diagnosis
By setting the status, the promise to pay is separated from thetransactions in Financial Accounting. For example, if clearing were tobe reset, the amount paid would not be updated.

System Response
You are not allowed to set status.

Procedure
Make the status change in Financial Accounting using reportFDM_P2P_AUTO_CONFIRM. Select only old invoices where you are sure thatthe payment will not be reversed or canceled.