/usr/share/doc/juju-1-default/changelog.Debian.gz is in juju-1-default 1.25.5-0ubuntu3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/juju-1-default/../juju-1.25/changelog.Debian.gz
/usr/share/doc/juju-1-default/../juju-1.25/changelog.Debian.gz