In another system I get this:
# dnf upgrade
Problem 1: cannot install the best update candidate for package
kajongg-16.12.3-2.fc27.noarch
- nothing provides python3-twisted >= 16.6.0 needed by kajongg-17.12.2-2.fc28.noarch
...
Skipping packages with broken dependencies:
kajongg noarch 17.12.2-2.fc28 fedora 4.7 M
Regards,
--
José Abílio