The tag is present in Lintian version 2.109.3. That is the most recent version we know about.
This non-native source package produces at least one binary package
Homepage field. However, the source package itself has
Homepage field. Unfortunately, this results in some
source-based tools/services (e.g. the PTS) not linking to the homepage
of the upstream project.
If you move the
Homepage field to the source paragraph in
debian/control then all binary packages from this source
will inherit the value by default.
Please refer to Debian Policy Manual section 5.6.23 for details.