COMMPR01 - Product Category not available when creating Service Product

Hi All,

I have added the object family 401 to my category CAT_MAINT_SERVICES (part of hierachy H_SERVICES -> Service Products). Since that moment when I want to create a new service product this category is not available anymore. But still available is the other category (ID: CAT_SERVICE2) where no object family is assigned (see Picture 1).

I have assigned the hierarchies to the applications already: Cross-Application Components a SAP Product a Product Category a Assign Category Hierarchies to Applications (see Picture1).

Is it possible assign a object family only to one category of the same hierarchy but not to the other one?

Thank you