SAP Message AP254 - Lack of authorization for WBS element &1 in assigned investment program

Diagnosis
You want to change plan values for WBS element &V1&. An investmentprogram position is directly or indirectly assigned to this WBSelement. You do not have authorization for changing plan values forprogram type &V2&, approval year &V3& and authorization level &V4& inthe requested plan version.

System Response
Planning for WBS element &V1& is not possible.