Warning:REMOTE HOST IDENTIFICATION HAS CHANGED!

If you are getting an error like when you are using SSH or SFTP just remove the
the .ssh folder from /home/ or from /root/
thats it try now you wont get any error

ERROR:
Connecting to .......
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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.
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Host key verification failed.
Couldn't read packet: Connection reset by peer