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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 a host key has just been changed.
The fingerprint for the ECDSA key sent by the remote host is
SHA256:mVI5SPfT7HMBM80ECmpVT9lZi9N4wfKJfJ8fffQEO+s.
Please contact your system administrator.
Add correct host key in /Users/guilherme/.ssh/known_hosts to get rid of this message.
Offending ECDSA key in /Users/guilherme/.ssh/known_hosts:1
ECDSA host key for 192.168.211.1 has changed and you have requested strict checking.
Host key verification failed.
anyone can help
Is it after an update?
Or s fresh install?
Iām that case, no problem. 
Yeah, your running on a windows machine and most likely did a new install or factory reset on the Volumio Device.
You need to navigate to:
/Users/guilherme/.ssh/
Open known_hosts with notepad
Remove the ip entry 192.168.211.1 for the volumio device (complete line) and save it.
If you use putty instead of ssh via the CMD shell, you can avoid these errors.
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