SAP Message B1244 - Object & is already defined in the model view &

Diagnosis
In connection with a sender and receiver, a customizing object can onlybe defined in several model views if the validity periods (fromdate.... to date) are disjunctive.
The object &V1& for sender &V3& and receiver &V4& is already defined inthe model view &V2&, whose period of validity overlaps with the periodof validity of
the model view to be updated.