Problems with separate zigbee and zwave USB sticks

New-ish to HA, using a RPi4 and a Zwave.me USB stick. Succesfully moved over all my zwave devices a couple weeks ago.

Also bought a conbee ii USB stick, and am having issues installing it.

I plugged it in, installed deconz, and was able to add devices quite happily.

Restarted the pi for some reason and my zwave network wasn’t working.

I assumed it was using the wrong USB device, but I can’t find anywhere to tell HA what the correct USB device is for the zwave stick?

I think I used the by-id device for the conbee, but I can’t remember HA asking me for the zwave stick, and for the life of me I can’t find reference to it anywhere. Is this likely to be my issue – and if so, where do I look to configure it?

Thanks!