# ~/ssh_server
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@    WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!     @
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IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!
Someone could be eavesdropping on you right now (man-in-the-middle attack)!
It is also possible that a host key has just been changed.
The fingerprint for the EF26630 key sent by the remote host is
SHA256:vdhgJUYHQ5/awJHUdbfdgC7KHUdjfghWgdhJHfjd7/dhgA.
Please contact your system administrator.
Add correct host key in /root/.ssh/known_hosts to get rid of this message.
Offending ECDSA key in /root/.ssh/known_hosts:4
  remove with:
  ssh-keygen -f "/root/.ssh/known_hosts" -R "47.337.334.82"
Host key for 47.337.334.82 has changed and you have requested strict checking.
Host key verification failed.

~/.ssh/known_hosts

$ ssh-keygen -f "/root/.ssh/known_hosts" -R "47.337.334.82"