Comment 3 for bug 1396299

The sentence " Ein unlösbares Problem trat beim Berechnen der Aktualisierung auf." form the description, means that an unsolvable error of the upgrade calculation procedure has occured.

That is exactly what the mail.log shows.

The upgrader was just removing packages and tried it also with The upgrader package itself. Because the upgrader package is in blacklist, no remove is possible. That is the error.