/usr/share/doc/libbpp-core-dev/changelog.Debian.gz is in libbpp-core-dev 2.0.3-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libbpp-core-dev/../libbpp-core2/changelog.Debian.gz
/usr/share/doc/libbpp-core-dev/../libbpp-core2/changelog.Debian.gz