مشکل در اتصال به ssh

[parsbin]

سلام
روی یک vps موقع اتصاال به ssh این ارور رو میگیرم.

@    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
34:41:21:8a:1d:3f:86:9f:25:c4:47:s9:59:6d:da:dc.
Please contact your system administrator.
Add correct host key in /home/amir/.ssh/known_hosts to get rid of this message.
Offending key in /home/amir/.ssh/known_hosts:2
RSA host key for 69.117.142.654 has changed and you have requested strict checking.
Host key verification failed. 

در فروم های غیر ایرانی جست و جو کردم همه نوشتن فلان دستور رو بزن.وقتی نمیشه وارد شد چطوری دستور بزنم؟! :D
مشکلش چیه؟