SAP Message WXP257 - Enter a target version that is different from "000"

Diagnosis
You have attempted to copy planning data to version number "000". Thisversion is reserved for actual data and cannot therefore beoverwritten.

System Response
The link is not executed.

Procedure
Change your entry for the target plan version. The plan versions thathave been reserved for target planning step &V1& can be defined usinginput help (F4).