/usr/share/doc/libparpack2-dev/changelog.Debian.gz is in libparpack2-dev 3.1.5-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libparpack2-dev/../libparpack2/changelog.Debian.gz
/usr/share/doc/libparpack2-dev/../libparpack2/changelog.Debian.gz