SAP Message BEF_CUSTOMIZING662 - Feature &2 redefines parameter &1 of service &3 incorrectly

Diagnosis
Feature &SYST-MSGV2& was derived from a service feature for serviceSyst-msgv3, and redefines default service parameter syst-msgv1.
A redefinition of this kind is only possible using a feature withclassification 'A'. Instead classification &SYST-MSGV4& was specified.

Procedure for System Administration
Correct classification of the feature variables. (Metadata tableBEFM_FV).