Security warning!!!

Hello Friends,
When I tried to scp from one server to another or even I tried to ssh to another server I got following message as error:

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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 the RSA host key has just been changed.
The fingerprint for the RSA key sent by the remote host is
ea:29:39:4e:b7:03:af:64:67:18:1f:77:da:dc:75:18.
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:1
Password authentication is disabled to avoid man-in-the-middle attacks.
X11 forwarding is disabled to avoid man-in-the-middle attacks.
Permission denied (publickey,password,keyboard-interactive).

Dose anybody know what is the problem.
It's urgent ,I want to tranfer mutiple domains via this.
Thank you.

 

 

 

 

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