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: Gianfranco Costamagna <email@example.com>
Date: Sun Apr 4 11:23:27 2021 +0200
Bump compat level to 13 again
https://salsa.debian.org/api/v4/projects/sistpoty-guest-guest%2Fdlt-viewer API request failed: 404 Not Found at /srv/qa.debian.org/data/vcswatch/vcswatch line 380.