The fingerprint for the ECDSA key sent by the remote host is
SHA256:9cca1Zbt5wy8i6p5yJM9EcuTlpLKjjUNfLMYRpgq81s.
Please contact your system administrator.
Add correct host key in /var/root/.ssh/known_hosts to get rid of this message.
Offending ECDSA key in /var/root/.ssh/known_hosts:1
ECDSA host key for x.x.x.x has changed and you have requested strict checking.
Host key verification failed.