You have two devices paired to HA Pro and combined licenses in MyZyxel running.
But now decided you want unpair that cluster. What´s the right procedure?
You can reset one of the paired devices to default (passive is better) and re-sync status to the MyZyxel via Reboot or "Resync" Button in the device Web interface.
The paired devices will back to unpaired status as standalone mode.
Do you want to have a look directly on one of our test devices? Have a look here in our virtual Lab: