This guy has been working fine for years, a few days ago he quit working. After trying exclusion, inclusion, factory reset, this is what I am left with.
Admittedly, it's pretty old, but maybe it just needs to be excluded, included. Or if it won't, I still don't want this entry. Refresh, remove, does nothing.
I have tried that power down, It's a plug in module. No change. Every time I put module into exclusion mode, Hubitat ends up saying unknown module excluded, but that node is still in Zwave list.
That means either you factory reset it before excluding it properly, or the device had some sort of malfunction and factory reset itself.
You should be able to pair it back. What hub do you have? I think the C8 may have issues onboarding those really old Leviton devices, but if they migrated from something like a C7 they would work.