SAP Message BEF_CUSTOMIZING627 - Naming conventions not observed for attribute &1

Diagnosis
Attribute &SYST-MSGV1& has been assigned in feature &SYST-MSGV2&, forexample. However, it does not correspond to naming conventions.Attributes may only contain letters, numbers and underscores.

System Response
The system cannot generate the application.

Procedure
Select another name for the attribute.