Message SAP WXP268 - Enter a plan version that is different from "000"

Diagnosis
You want to delete data for plan version "000".This version is, however, reserved for actual data and thus cannot bedeleted.

System Response
The data for version "000" cannot be deleted.

Procedure
Change the entry for the plan version. The plan versions that have beenreserved for planning step &V1& can be identifiedusing input help (F4).