WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! || SSH

Problem:

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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
SHA256:9cw8z+XkMzK09077WQVzFPZllB38LUzW+odbhEp3mm0.
Please contact your system administrator.
Add correct host key in /Users/imac/.ssh/known_hosts to get rid of this message.
Offending ECDSA key in /Users/imac/.ssh/known_hosts:14
ECDSA host key for [192.180.251.241] has changed and you have requested strict checking.
Host key verification failed.
olineit-iMac:~ imac$ ssh root@[IP or Hostname]

Solution:

ssh-keygen -R [hostname or IP]