Ugh, the C7 is driving me crazy. I tried moving a bunch of devices from my C3 hub to a new C7 a few weeks ago. I had pairing and stability issues, and ended up with some ghost devices. I was able to remove all but one. After a week I gave up, reset the zwave radio, and started again from scratch.
I was more careful the second time. I moved the hub to a better location, and built up the mesh more slowly. It was looking good! After a couple days of settling, I tried to add a GE switch and it failed. I checked the Zwave device info and didn't see anything odd, so I tried pairing again and it worked.
A few hours later I tried pairing an Aeotec MS6. The sensor showed that it paired, but Hubitat did not. I tried excluding the sensor a couple times, but never got an acknowledgement from Hubitat or the sensor that it worked. That got me a bit worried, and I rebooted the hub. After the restart, the hub showed 2 ghost devices (one before and one after the GE switch).
I attempted to exclude the GE switch a couple of times, but the excuse never worked, so I ended up force removing it and doing a factory reset on the switch. I rebooted the hub and ended up with the two ghost devices and the GE switch again (even though I had removed it).
I disconnected the GE switch and the MS6 from power and tried to do the refresh+remove process in Hubitat, but none of the ghost devices would remove. Then I plugged the Nortek stick from my C3 into a computer, downloaded PC Controller, and tried using it to remove the ghost nodes. No dice. (I could see the ghost nodes, but trying to mark them as "failed" always, well, failed.) To top it all off, I couldn't exclude the PC from the mesh when I was done trying to remove things (I had paired and unpaired the PC once while trying it out, but couldn't unpair it the second time).
Is there any way to definitively clean up a mesh, or is trashing it and starting over pretty much it? Or is it fine to leave a few ghost nodes around if you're sure you've fully reset the devices in question? (I've read conflicting advice about that.)