Purchased two copies of Backupper and the offline key registration is not valid
I purchased two copies of AOMEI Backupper Server (Yearly / 1 Server). Planning to clone one server to new server hardware. After going through a few practice runs the offline registration key I'm using for the new server restore is no longer working. I'm getting a dialogue indicating that I need to repurchase a copy of Backupper. Is there a limit to the number of restores I can complete from the old server to the new machine? The new machine has not changed, same machine everytime (the disk array configuration has changed though).