I got rid of the WARN by editing :
/var/lib/openhab/config/org/openhab/addons.config and manually editing the bindings line to remove PLEX.
(There is a super long winded thread on how to remove old bindings, honestly didn’t have the time to read it, it goes in circles quickly.
Also had to do: chown openhab:openhab on the new jar in the addons folder, then it came alive on restart.
Now however - all my existing Plex THINGS are “Unknown” .
I started a plex player and used the SCAN feature when adding a thing and it detected a player running - So I added it and tested it was indeed the one that I was running as the status in the associated ITEM was being updated on play/pause. Inspected the THING and saw the machineid is not what it used to be, its also not listed in : https://plex.tv/devices.xml
It is a real PITA to recreated ALL the PLEX THINGS, so…
Where is the scanner getting its machine ids from?