SAP Message AY304 - Ind. "AuC per source struct..." only allowed if "Manage AuC" selected

Diagnosis
The indicator "AuC per source structure/assignment" is set, but theindicator "manage AuC" is not set.

System Response
Both indicators are returned to the status they had before the changewas made.

Procedure
If you want to set the indicator "AuC per source structure/assignment"then you also have to set the indicator "manage AuC."