I would try to put the comb back soon, either tie it up with string or rubber bands. Yesterday I caught a swarm, was putting them on drawn comb. On one of the frames the comb fell out, I got 3 rubber band and put it back up. Good luck to you and your bees. I just give it a lite brush and go ahead. Have which ever you would want to use, string or rubber bands,etc ready. Open the hive and fix comb there and put it back in.
Joe