Module 3 issue while setting up

on setting up for module 3 when i type
git pull ME_QBOX_MODULE_CLIENT_SERVER_STUB master --allow-unrelated-histories
it says,
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@ WARNING: POSSIBLE DNS SPOOFING DETECTED! @
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The ECDSA host key for gitlab.crio.do has changed,
and the key for the corresponding IP address 3.6.224.204
is unknown. This could either mean that
DNS SPOOFING is happening or the IP address for the host
and its host key have changed at the same time.
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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:FrBgRdji+ozEiYvp9mws7pcBjX/oGWyZzs8v5WmJKtA.
Please contact your system administrator.
Add correct host key in /home/crio-user/.ssh/known_hosts to get rid of this message.
Offending ECDSA key in /home/crio-user/.ssh/known_hosts:1
remove with:
ssh-keygen -f “/home/crio-user/.ssh/known_hosts” -R “gitlab.crio.do”
ECDSA host key for gitlab.crio.do 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.

Please try the following
ssh-keygen -f "/home/crio-user/.ssh/known_hosts" -R "gitlab.crio.do"