I hope it is a little bit more legible now, although spoken with my poor (Czech)English.
Editor reads your claim records before each mission, looking for any enemy ace and if found any, it cancels his assignment in the edited/saved mission.
So this is pilot specific? I usually have about 6 pilot careers going at any one time. Pilot 1 may have already shot down MvR, while Pilot 2 may not have. The editor knows who's flying and which Claims Records to check?