When transfere DHCP from server to server including upgrade versions, the simple way to this is with NETSH, after you have installed the DHCP role on the new server, you want
To export all setting, go to command prompt on original server execute as administrator ,dhcp.txt is an example and it will be save on drive C:
netsh dhcp server export c:\dhcp.txt all
Then stop the dhcp services on the original server and copy the dhcp.txt to the new server , in this example to Drive C: .Then on the new server execute from command promt as administrator :
netsh dhcp server import c:\dhcp.txt all
Restart the DHCP SERVER Service and that its !