Here we are going to see, How to Export PUTTY Sessions list to Another Computer,
Run the below command on a source system ( to taking backup / export existing session list)
regedit /e “%userprofile%\desktop\putty-sessions.reg” HKEY_CURRENT_USER\Software\SimonTatham\PuTTY\Sessions
Do the below taskson a remote system ( Importing from reg file)
to copy the putty-sessions.reg file on remote system.
then right click on a file & merge it.