paperless-ngx: re-install and change from privileged -> non-privileged LXC

[endbacher]

Hello all,
despite several attempts to fix my issue with paperless-ngx services not starting on restart (details see here) I meanwhile think that on long term a new installation might help: What is the recommended way to do a fresh install and to move all existing paperless-ngx data from the current to the new installation without messing up everything (on current installation I selected "privileged" and would lower this to "non-privileged" LXC setup)?

Thanks, endbacher.