Hi all,
I followed the suggested approach (removing packages on old system, create config backup on old system, restore config backup on new system, reinstall packages on new system). All worked fine but I overlooked one thing… Thanks to a prompt reply fro Netgate support I managed to resolve this.
The issue was that the network card configuration (the network interface naming in the config backup was not compatible with the new system) and the device got stuck in the console waiting for network card assignment. Connecting through a serial connection with the console I could select interfaces and proceed.
Thanks for the support!
regards.