SAP Message R7B247 - Char. &1 still being used as reference by &2 -reference cannot be changed

Diagnosis You have changed the reference from characteristic &V1& to &V3&. Butcharacteristic &V2& simultaneously still has &V1& as a Referencecharactic. System Response Characteristic &V1& cannot be activated. Procedure Change the reference characteristic for &V2& to &V3&.