REMOTE HOST IDENTIFICATION HAS CHANGED

[root@bak /usr/ports/distfiles]# scp -r * [email protected]:/usr/ports/distfiles/ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@ 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
a1:b7:5c:fe:cb:78:61:63:f4:ea:7a:9a:78:f0:cb:b7.
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:4
RSA host key for 192.168.1.145 has changed and you have requested strict checking.
Host key verification failed.
lost connection
[root@bak /usr/ports/distfiles]# rm -rf /root/.ssh/known_hosts
[root@bak /usr/ports/distfiles]# scp -r * [email protected]:/usr/ports/distfiles/
The authenticity of host ‘192.168.1.145 (192.168.1.145)’ can’t be established.
RSA key fingerprint is a1:b7:5c:fe:cb:78:61:63:f4:ea:7a:9a:78:f0:cb:b7.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added ‘192.168.1.145’ (RSA) to the list of known hosts.
Password:enter your password!
OK!