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 a host key has just been changed.
The fingerprint for the ED25519 key sent by the remote host is
SHA256:XYwu70VGqO8wdvQ+UOPU0B1CcA68DZq4WGhx+tXCc6A.
Please contact your system administrator.
Add correct host key in /Users/cj/.ssh/known_hosts to get rid of this message.
Offending ECDSA key in /Users/cj/.ssh/known_hosts:10
Host key for 81.69.245.139 has changed and you have requested strict checking.
Host key verification failed.

解决方法：

将本地/Users/cj/.ssh/known_hosts 文件删除

rm ~/.ssh/known_hosts