Old topics redirect
Let's say you have a topic
you renamed it to something like
anyway it's still can be reached by following urls
theoretically you can make a rewrite rule with regex in your server definition (if you're using nginx as reverse-proxy) for redirect all urls like /* by default min topic name length = 3 */
but there is a major caveat
will not work
BUT actually you still may reach this address
by using hash part of url
so, you able to make a rewrite rule that contains this case too
it will looks like
It all should work but I didn't tested it.
Currently when you rename a topic, it changes the url and deletes the old url. I think that a nice plugin/feature would be if the old url redirected to the new one.
It used to. But it meant that something else didn't work. So was removed. Baris made a post about it in a similar topic a few months ago.