SAP Message AO235 - Not possible to delete approp. request &1 - project is active

Diagnosis
You want to delete appropriation request &V1&.
The project definition &V1& that belongs to it is already activated.

System Response
Deleting the appropriation request is not possible.

Procedure
If you want to delete appropriation request &V1&, check whether you candelete the project definition in the PS (Project System) component.