SAP Message UCF0008 - Globally-defined characteristic &2 may not be used in &1

Diagnosis You want to use characteristic &SYST-MSGV2& in column &SYST-MSGV1&.However, characteristic &SYST-MSGV2& is already defined as global(higher-level) and therefore cannot be used here. System Response Layout has an error and cannot be saved. Procedure Remove characteristic &SYST-MSGV2& from column &SYST-MSGV1&.