WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED

[Aqvdrt]

admin@MBP ~ % ssh [email protected]
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@ 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 a host key has just been changed.
The fingerprint for the RSA key sent by the remote host is
SHA256:***************************************.
Please contact your system administrator.
Add correct host key in /Users/admin/.ssh/known_hosts to get rid of this message.
Offending RSA key in /Users/admin/.ssh/known_hosts:6
Host key for 192.168.31.1 has changed and you have requested strict checking.
Host key verification failed.

[maxesisn]

这是因为你之前连过IP同样为192.168.31.1的其它设备（或者同一设备但刷过系统），在/Users/admin/.ssh/known_hosts里删掉192.168.31.1开头的行就行