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: Boris Pek <firstname.lastname@example.org>
Date: Mon Dec 10 03:45:41 2018 +0300
https://salsa.debian.org/api/v4/projects/qt-kde-team%2Fextras%2Fqtcurve API request failed: 500 Internal Server Error at /srv/qa.debian.org/data/vcswatch/vcswatch line 387.