In the public sector, tbh, the quality of candidates is so bad that everyone you get on the first round of applicants can be totally unqualified.

So, you have to reopen the posting or start all over.

And the second set of candidates is just as bad.

So you close it and rewrite the description (not that fucking HR was competent at that in the first place), and go back to step one, which you are highly likely to repeat.