this package seems to have new commits in its VCS but has
not yet updated debian/changelog. You should consider updating
the Debian changelog and uploading this new version into the archive.
Here are the relevant commit logs:
Author: Vincent Bernat <email@example.com>
Date: Sat Sep 21 21:31:04 2019 +0200
d/gbp.conf: use DEFAULT section instead of buildpackage