SSH 접속 시 WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!

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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 ECDSA key sent by the remote host is
SHA256:~~~.
Please contact your system administrator.
Add correct host key in ~/.ssh/known_hosts to get rid of this message.
Offending ECDSA key in ~/.ssh/known_hosts:4
Host key for IP has changed and you have requested strict checking.
Host key verification failed.

• 이미 known_hosts 파일에 등록된 IP에 대해 다른 공개키를 전송받은 경우 발생하는 문제이다.

• .ssh/known_hosts 파일에서 해당 IP를 지워주면 된다.