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の解決法

AWSの作業をしていたら以下のエラー。

S:.ssh sahota0701nemoto$ ssh -i aaaa.pem ec2-user@18.180.202.188
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@    WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!     @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
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:TyeE9O0wDaMbxrOIaYWj50sPOgWFnJzkEs55zjhHUuk.
Please contact your system administrator.
Add correct host key in /Users/shogo/.ssh/known_hosts to get rid of this message.
Offending ECDSA key in /Users/shogo/.ssh/known_hosts:10
ECDSA host key for 18.180.202.188 has changed and you have requested strict checking.
Host key verification failed.

キーがなくなった。したがって新しい物を作ります。

S:.ssh sahota0701nemoto$ ssh-keygen -R 18.180.202.188
# Host 18.180.202.188 found: line 10
/Users/shogo/.ssh/known_hosts updated.
Original contents retained as /Users/shogo/.ssh/known_hosts.old
S:.ssh sahota0701nemoto$ 

$ ssh-keygen -R 自身のIpアドレスもしくは弾かれた物。

終わり。