Diagnosis
You have attempted to delete characteristic &V3& (&V4&). However, thischaracteristic is required by key figure &V1& (&V2&) as a unit . If akey figure references a characteristic as a unit, then thischaracteristic must also be contained in the planning level.

Procedure
In order to be able to delete characteristic &V3&, you must firstdelete all key figures that reference the characteristic as a unit.