SAP Message R1750 - &: Generic value not permitted for & &

Diagnosis
When the BP relationship/role definition category was defined, itdesignated that the BP relationships/role definitions belonging to thiscategory can be differentiated using element &V1&.
Value ' ' for element '&V1&' with definition 'applies to all validvalues' (generic value) is not possible for this BP relationship/roledefinition category.

Procedure
Enter a valid value to further differentiate element '&V1&'.