/usr/share/doc/libxpa-dev/changelog.Debian.gz is in libxpa-dev 2.1.18-4.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libxpa-dev/../libxpa1/changelog.Debian.gz
/usr/share/doc/libxpa-dev/../libxpa1/changelog.Debian.gz