Type a comment under that entry, it could move it up back again on the notebook entries page and someone could pick it up.

If you are running into your limit of notebook entries and want to get more corrections, you might want to also write notebook corrections on another site.  I wrote about the site I prefer for notebook corrections here:  https://www.italki.com/discussion/133726  I do not think there are limits there and if you have a notebook entry on italki that has not been corrected you could get corrections there.