SSH RSA2 key fingerprint

Happy New Year everyone. I’m hoping someone can help.

I am trying to SSH to a server from a Mikrotik 493 with Router OS 6.19 that is directly connected to the server on a certain ethernet port. These devices are at a remote location from where I am located. The reason I have to do this is because the remote server IP address has reverted to its default IP and there’s no way to add a route to it from my location. I’m able to add a route to this server from the the 493 and since the Mikrotik possesses the SSH tool, I should be able to access the CLI of the server. I’ve confirmed I can ping the server on the IP.

However, when I try this, it disconnects from the server altogether. I suspect it is because of a rsa2 key fingerprint alert that might be generated (see attached from what I get from Putty SSH Client software as example).

Is there some way to install the server’s host key into cache on the 493? Is there another problem?
rsa key.jpg