Diagnosis
An object can be assigned to only one term number at the most per termcategory. The assignment of an object group to a term corresponds tothe assignment of all individual objects in the object group.
V1 v2 is already assigned to term v4 via object group v3.

Procedure
If necessary, first delete the assignment of object group &V3& in termV4. however, remember that you thereby also remove the indirectassignment of the individual objects in the object group.