FGMS-001 unavailable ... But it's there!

I have a raspberry Pi running HA and an AEON Labs ZW090 Z - Stick Gen 5 USB controller.
I have one existing FGMS-001 running successfully and have just tried to add another.(second hand…?) device.
I can see it in Devices (No Node No.) but when I look at Configure>Integrations>Z-Wave>Devices it isn’t there.
If I use Configurations>Devices and select the new FGMS-001 it says “unavailable” for all entities.

Any ideas? And if this is a firmware issue how do I upgrade the FGMS-001 firmware?

Many thanks