SAP Message AH793 - Unknown calculation reason: &1

Diagnosis
Document &v2& cannot be deleted due to an unknown calculation reasonV1.

System Response
Deletion has been terminated.

Procedure
The document may be a legacy document that was created with an oldversion. In Transaction EA16 (change mode), make a change and save it.After that the document should be deletable. If it is not, there is aninconsistency. Contact SAP in this case.