sorry for being unclear.
i couldn’t delete the files when doing it without sudo for access reasons. And with sudo i don’t get an error but the files aren’t removed.
For now after a few restarts the problem is gone, but i had it various times and its unclear when restarting helps and when it doesn’t work.
Apologies for the late reply.
In my case I’m running openHAB on docker, so I believe that in my case deleting the file works because I can easily stop the container (which probably releases the file). If you have problems deleting the file on your end, try to stop openHAB.