/usr/share/doc/libmtp-dbg/changelog.Debian.gz is in libmtp-dbg 1.1.6-20-g1b9f164-1ubuntu2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libmtp-dbg/../libmtp9/changelog.Debian.gz
/usr/share/doc/libmtp-dbg/../libmtp9/changelog.Debian.gz