My link still goes to the old destination
Almost always a cached 301 in the visitor’s browser rather than a stale record on our side.
Check the link in a private window
If it goes to the new destination there, our side is correct and the original browser is holding a cached permanent redirect.
Check the redirect type
A 301 or 308 tells browsers to remember the answer. There is no way to recall that from our side once it is cached.
Switch the link to 302 for the future
It will not clear what is already cached, but it prevents the same trap on the next edit.
The cached resolution is dropped the moment you save an edit, so a stale answer from us lasts no longer than the request that was already in flight.