I created a snapshot from droplet ‘X’.
Then I created a new droplet “Y” using the snapshot above.

Then I assign new Domain, floating IP and able to login using SSH to the newly created droplet 'Y’.
I have updated the DNS of the domain as well.

Now once I browse the new domain which pointed to new droplet 'Y’, , it’s redirect to the Droplet “X” IP / Domain.

[ Note ] : The source droplet “X” has SSL enabled and also has postfix installed. I had to update the host and Port too.