Diagnosis
You want to assign architectural object &V1& to usage objects&V2& and &V3& in the same company code in interval&V4&. However, this is not possible.
Only one usage object of the type business entity, land orbuilding can be assigned to an architectural object within a companycode.
A complete assignment at the same time is only possible tobuildings/land and rental objects or to pooled spaces.

Procedure
Decide which of the two assignments you want and cancel the other one.