After cloning

After the clone, there is a need to make machine 'unique':

Ensure, it is a new machine, it's uptime should be low.

uptime

Check network interfaces

ip -br a

Set new hostname

sudo su
hostnamectl hostname (new_hostname)

Remove current server's SSH keys and generate new ones to avoid confusion on connecting

rm -rf /etc/ssh/ssh_host_*
ssh-keygen -A

Reboot the machine to ensure it will apply it's hostname in depended services locally and in the network

shutdown -r now

Possible situations:

You may need to remove old SSH keys, to perform it:

$ ssh-keygen -R 10.77.84.133

# Host 10.77.84.133 found: line 27
/home/anton/.ssh/known_hosts updated.
Original contents retained as /home/anton/.ssh/known_hosts.old