SAP Message XC107 - &1: ATP check not defined for system &2

Diagnosis You have specified that the ATP check for the combination &V1& shouldtake place in system &V2& instead of system &V3& in another model. Thisis inconsistent, since the ATP check can only take place in one APO.The conflicting model is &V4&. System Response If you want to activate this or another model, the behavior of the ATPcheck is undefined. Procedure Deactivate or delete models in such a way that a maximum of one systemis marked as active for the ATP check for the combination &V1&.