SAP Message BEF_CUSTOMIZING661 - Feature &2 does not redefine parameter &1 of service &3

Diagnosis
Feature &SYST-MSGV2& has been derived from a service feature. Thisdefines service parameter &SYST-MSGV1& that must be assigned a value inthe derived feature.
A variable with the name &SYST-MSGV1& and classification A has not yetbeen created for feature &SYST-MSGV2&.

System Response
The system cannot generate the application.

Procedure
Compare the feature variables of service feature /&SYST-MSGV3& withvariables that have been created for feature &SYST-MSGV2&, and completemissing variable definitions.