ditto what Shane says.
do all your archival clips start with zero TC?
then there’s a problem.
do all of them have burnt in TC?
then your assistant has some work to do!
BUT to answer your question:
i believe QT CHange will batch change reel#s
you can *sort of * do it within FCP, too.
change one clip to the reel# you want,
select all the clips you want to have that reel# (including the one you just changed)
RIGHT CLICK on the reel# of the one you just changed in the reel column of the browser,
and you get a list of all see#s in your project,
chose the one you want, and all will change.
good luck
nick