Diagnosis
You want to assign a program position to an organizational unit of theenterprise organization. This requires that a unique controlling areais set for this organizational unit during the entire assignmentperiod.
However, the controlling area, which the organizational unit recievesfrom the enterprise organization, changes during the selectedassignment period.

System Response
Assigning the program position to the organizational unit is notallowed.

Procedure
Choose an assignment period during which the controlling areaprescribed by the enterprise organization is unique.