SAP Message WXP191 - Attribute &1 is already assigned to characteristic &2

Diagnosis You want to use master data attribute &V1& of the planningcharacteristic &V3& in manual planning. The attribute is already in usein planning characteristic &V2&, however. A double assignment is notpossible. System Response This assignment is not taken on. Procedure If you want to use this assortment (&V1&, &V3&), you need to delete theexisting assignment of the attribute (&V1&, &V2&).