Hello !
(excuse my english, I’m trying, I’m french !)
It’s my first post on this community, so please be tolerant ! 
So far, i’ve found everything i needed on this amazing and complete forum, but this time i’m stucked.
I installed zwave network on HA and it’s working fine. I’m using a UZB1-ZME stick and I used this tutorial to make it work : https://www.home-assistant.io/docs/z-wave/device-specific/#razberry-board
Si I edited the /boot/config file and added
dtoverlay=pi3-disable-bt
But, I update HASSIOS and HA and I think this operation erased my modifications on this file. I’m scared of doing it at any update of the server.
Well, is there any operation I could do to avoid this problem ?
Thank you for your reply.
Andy