Diagnosis
You want to create or change a class item and have entered resultingitem category &V1&. The resulting item category you can select dependson the object linked to the class type.
However, resulting item category &V1& is not supported for the selectedclass type.

Procedure
Place the cursor on the Resulting item category field.
Display the possible entries and select one of the resulting itemcategories that corresponds to the object linked to the class type.