sudo dnf system-upgrade download --refresh --releasever=31 gives this error:
Error: Problem: problem with installed package nvidia-driver-3:435.21-2.fc30.x86_64 - package nvidia-driver-3:435.21-1.fc31.x86_64 conflicts with xorg-x11-drv-nvidia-304xx provided by rpmfusion-nonfree-obsolete-packages-31-1.fc31.noarch - package nvidia-driver-3:435.21-2.fc31.x86_64 conflicts with xorg-x11-drv-nvidia-304xx provided by rpmfusion-nonfree-obsolete-packages-31-1.fc31.noarch - problem with installed package gstreamer-plugins-bad-nonfree-0.10.23-9.fc30.x86_64 - nvidia-driver-3:435.21-2.fc30.x86_64 does not belong to a distupgrade repository - gstreamer-plugins-bad-nonfree-0.10.23-9.fc30.x86_64 does not belong to a distupgrade repository (try to add '--allowerasing' to command line to replace conflicting packages or '--skip-broken' to skip uninstallable packages)
nvidia-driver comes from the negativo repo. I’m not sure why there is a conflict with
xorg-x11-drv-nvidia as I do not have that package installed. Also note the version difference.
gstreamer-plugins-bad-nonfree issue doesn’t have much explanation. Maybe that is being replaced by a different package?