SAP Message PV810 - The resource type for the room reservation &1 is historically recorded

Diagnosis You are attempting to edit the resource type &V1& which has ahistorical record flag. A historical record flag locks an object forchange. This error occurs when you try to create relationships. Creatingrelationships constitutes changing the object and, as such, is notallowed. System Response None. Procedure Please choose a resource type for Room Reservations that does not havea historical record flag.