Beet move doesn't rename files after per_disc_numbering change

I used not to specify per_disc_numbering in my config. I made a change this morning, but beet move -p doesn’t want to move anything. Am I missing anything? I expect my files to be renamed.

per_disc_numbering: yes
    default: $albumartist/$album%aunique{}/%if{$multidisc,$disc-}$track $title

That takes effect at import time, since it affects how the metadata is set, not how it’s translated into paths. You’ll need to re-import to see it take effect.