SAP Message REBDCA044 - Rntl space &1 must be assigned to arch.hierarchy of your pooled space &2

Diagnosis You want to assign rental space &V1& to an architectural object.However, this architectural object (&V3&) is not in thesame architectural hierarchy as the architectural object (or one of thearchitectural objects), to which the superordinate pooled space of therental space is assigned. Procedure The rental space has to be uniquely assigned to an architectural objectthat belongs to the same architectural hierarchy that the pooled spaceis assigned to. This is required so that the system can determine thelink between the objects, and can compare the size of the rental spacein the architectural view and in the pooled space.