Interesting, I only learned of it recently, it seems a patch was added to Ubuntu called "mention-ssh-keygen-on-keychange.patch" which puts explicit mention of s

Interesting, I only learned of it recently, it seems a patch was added to Ubuntu called "mention-ssh-keygen-on-keychange.patch" which puts explicit mention of ssh-keygen -R into the error message, I had assumed it was part of openssh itself and arrived at the same time. This patch was explicitly rejected in upstream openssh as they said it could lead people to copy and paste it without considering attacks - but ignored the fact that by just telling people what file it was in, many people just deleted the file in response and those who did it right, deleting just the relevant line in cases where a key change was expected like my situation, never discovered the easier ssh-keygen -R method. Perhaps they shouldn't offer a copy and paste solution, but mentioning that ssh-keygen is capable of it and to see the docs would be nice at least...