SAP Message REV026 - This numerical value is not permissible for the revision number

Diagnosis You have the ADDON Discrete Industries active, thus the MaintenanceEvent Builder is active, and therefore also the internal numberassignment for the revision. The number &V1& falls in this internalnumber range and is therefore not permissible. You can use transaction DIPWS_REVNR to maintain the internal numberrange, which is used for generated revisions through the MEB.