Diagnosis
Confirmation &V1&, counter &V2& was entered for a milestone operation.This means that preceding operations were automatically confirmed atthe same time.Goods movements were also entered for the confirmed operation(backflushing/automatic goods receipt). The document for the goodsmovements may contain components that are allocated to precedingoperations.
Since a milestone confirmation only creates one document for alloperations concerned, and since confirmations automatically created bythe milestone confirmation may have been cancelled manually, it is notpossible to determine, which goods movements were posted with themilestone operation.

Procedure
Check, whether the cancellation of confirmation &V1&, counter &V2&should also cancel all the goods movements posted with theconfirmation.
If individual goods movements should not be canceled, you need tocorrect the goods movements list before you save your entries.