SSH Remote Host Error

Remote Host Error:

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@    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 RSA key sent by the remote host is
51:82:11:11:7e:6f:ac:ac:de:f1:53:08:1c:7d:55:68.
Please contact your system administrator.
Add correct host key in /../.ssh/known_hosts to get rid of this message.
Offending RSA key in /../.ssh/known_hosts:12
RSA host key for 111.11.11.111 has changed and you have requested strict checking.
Host key verification failed.

Solution:

Only type:

ssh-keygen -R "you server hostname or ip"

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