ssh ip "WARING:REMOTE HOST IDENTIFICATION HAS CHANGED!"

[root@ok network-scripts]# ssh 192.168.1.10
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@    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 the RSA host key has just been changed.
The fingerprint for the RSA key sent by the remote host is
8b:e7:b8:6b:eb:a8:2d:06:7b:f1:75:c9:b5:48:a9:06.
Please contact your system administrator.
Add correct host key in /root/.ssh/known_hosts to get rid of this message.
Offending key in /root/.ssh/known_hosts:19
RSA host key for 192.168.1.10 has changed and you have requested strict checking.
Host key verification failed.

[root@ok network-scripts]# mv ~/.ssh/known_hosts ~/.ssh/known_hosts.bak
[root@ok network-scripts]# ssh 192.168.1.10
The authenticity of host '192.168.1.10 (192.168.1.10)' can't be established.
RSA key fingerprint is 8b:e7:b8:6b:eb:a8:2d:06:7b:f1:75:c9:b5:48:a9:06.
Are you sure you want to continue connecting (yes/no)?