IP/key change for gitlab.haskell.org?

[Richard Eisenberg]

An innocent `git push` yielded this today:

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@       WARNING: POSSIBLE DNS SPOOFING DETECTED!          @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
The ED25519 host key for gitlab.haskell.org has changed,
and the key for the corresponding IP address 139.178.85.33
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.
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@    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 ED25519 key sent by the remote host is
SHA256:/dI7zsBRZNPB+0TqskF7rSaZ/LhQw0cF4c5W+4uMlRo.
Please contact your system administrator.
Add correct host key in /Users/rae/.ssh/known_hosts to get rid of this message.
Offending ED25519 key in /Users/rae/.ssh/known_hosts:21
ED25519 host key for gitlab.haskell.org has changed and you have requested strict checking.
Host key verification failed.

I know the server had a rough weekend. Is this a natural consequence, or is something fishy going on?

Thanks,
Richard