SAP Message AP145 - Budget category &2 for program type &1 is not used in Customizing

Diagnosis
Budget category &V2& (program type &V1&) is used in the assignment ofactual values.

System Response
The system cannot delete budget category &V2& (program type &V1&).

Procedure
First delete all entries of budget category &V2& (program type &V1&) inthe assignment of actual values ("Assign actual values") in InvestmentManagement Customizing.