It looks like there was a duplication of handling of the file being moved in the package:
1. Using mv_conffile: https://salsa.debian.org/pkg-voip-team/mumble/-/blob/debian/debian/mumble-server.maintscript?ref_type=heads 2. Custom code in mumble-server.preinst: https://salsa.debian.org/pkg-voip-team/mumble/-/blob/debian/debian/mumble-server.preinst?ref_type=heads#L18 I recommend to keep using mv_conffile, and remove the handling in mumble-server.preinst.
OpenPGP_signature.asc
Description: OpenPGP digital signature