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: Alexandre Rossi <email@example.com>
Date: Sat May 1 16:31:18 2021 +0200
drop Suggests of libswt-gtk2-4-jni which is gone from the archive