Diagnosis
You are trying to delete a previously entered advance from &V1& &V2&.
In order to make it possible to document the history of advancesaccurately, advances that have been entered in the past cannot bechanged subsequently.
The advance is therefore not ready for input and cannot be deleted.

Procedure
Enter a new advance with the same amount but as a negative value. Sincethe amounts cancel each other out, you thus cancel the advance amount.