SAP Message 8A331 - Particular document header changes are not allowed

Diagnosis
The system has to assign a new document number according to thedocument header changes made. This would lead to inconsistencies in thewithholding tax data.

Example
You changed the posting date leading to another fiscal year.

System Response
The changes are not performed.

Procedure
Please do not make changes that lead to a different document number.You might want to delete this parked document and create a new one witha different posting date.