The tag is present in Lintian version 2.104.244. That is the most recent version we know about.
Distribution in the
.changes file indicates
that packages should be installed into a non-experimental distribution
(suite), but the distribution in the
Changes field copied from
debian/changelog indicates that experimental was intended.
This is an easy mistake to make when invoking "sbuild ... foo.dsc".
-d option if using sbuild in this way.