/usr/share/doc/libgwenhywfar60-dev/changelog.Debian.gz is in libgwenhywfar60-dev 4.3.1-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libgwenhywfar60-dev/../libgwenhywfar60/changelog.Debian.gz