/usr/share/doc/libucommon-dev/changelog.Debian.gz is in libucommon-dev 6.0.7-1.1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libucommon-dev/../libucommon6/changelog.Debian.gz
/usr/share/doc/libucommon-dev/../libucommon6/changelog.Debian.gz