xiaomi+fhem+zigbee-shepherd dev.db everytime create new after reboot.....

[venuel79]

Hey, realy its work great on my brix with ubuntu-16.04.3-server-amd64(LTS) , fhem paired great the "sensors" and they working fine and fast ...till...the moment when i restart my brix, all the sensors are still staying in fhem, but not active anymore,i need to paired again every one(but no option wit 43 devices...),i search the problem, so i see the dev.db is everytime after reboot empty,only first orginal line is there writing. So it seems 2 me that "someone" create the dev.db everytime brand new...for sure withouth paring informations :( . What can be the Problem? I try actualy many now, with user right etc. But the problem dont want go away.Please forgive me all my questins ,iam not so long in touch with linux&zigbee. Also forgive my engl. please.
Best regards,and a nice sunny day!