Oh! Sumta’s post just reminded me of something. I was learning second position just the other day and having some difficulty because my teacher wanted me to play it in first and third position first (so that I could tell if I played a sharp, flat, or natural accidentally [no pun intended]). Of course, the fingering was made for second position, and I realized that I was becoming quite dependent on the numbers and not the actual notes!
And the moral of the story is…
a) avoid writing in fingerings whenever possible (save it for shifts)
b) consider crossing out fingering
c) regularly practice music that contains no fingerings!