The tool to get rid of the ghost node is called Zensys tool. You can find it here (Post 5): Looking for Zensys Tools - #5 by marc_o
There is also a newer version called ZWaveControllerUI, which is part of “Z-Wave PC-Controller” from SiliconLabs. Unfortunately it is quite tricky to get it: you must to create a free account at SiliconLabs, download and install “Simplicity Studio”, use Simplicity Studio to download “PC Controller” somehow. Very tricky and complicated! Simplicity Studio is everything except simple. If you get the Zensys tool it will do the job.
BTW: Looking into the Z-Wave log will not help. I’ve learned that you can only see the communication between openhab and the stick - which is quite boring, because the delay happens between stick and node. You can’t see this in the Z-Wave log. If you want to see the communication between stick and node you need a “Zniffer”. Getting this is complicated too (you need “Simplicity Studio” 
) but it provides a lot on insights on what is going on in your Z-Wave network.