Hexo 部署到个人ubuntu服务器 hexo deploy时报错

hexo deploy 时报错如下

INFO  Deploying: git
INFO  Clearing .deploy_git folder...
INFO  Copying files from public folder...
INFO  Copying files from extend dirs...
On branch master
nothing to commit, working tree clean
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@    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 ECDSA key sent by the remote host is
SHA256:xxx.
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 [myhost] has changed and you have requested strict checking.
Host key verification failed.
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.
FATAL Something's wrong. Maybe you can find the solution here: https://hexo.io/docs/troubleshooting.html
Error: Spawn failed
    at ChildProcess.<anonymous> (/Users/qingchen-mac/blog/node_modules/hexo-util/lib/spawn.js:51:21)
    at ChildProcess.emit (events.js:210:5)
    at Process.ChildProcess._handle.onexit (internal/child_process.js:272:12)

_cofig,yml 部分配置如下

deploy:
  type: git
  repo: git@1.1.1.1:/home/git/repos/blog.git
  branch: master

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