https://bugzilla.redhat.com/show_bug.cgi?id=1771173
--- Comment #10 from Robert-André Mauchin zebob.m@gmail.com --- - You're including the data twice by having %{_datadir}/%{name} in the main package
%files -f %{name}.lang %license LICENSE %doc README.md AUTHORS %{_bindir}/xournal-thumbnailer %{_bindir}/%{name} %{_datadir}/applications/com.github.%{name}.%{name}.desktop %{_datadir}/icons/hicolor/scalable/apps/com.github.%{name}.%{name}.svg %{_datadir}/icons/hicolor/scalable/mimetypes/* %{_datadir}/mime/packages/com.github.%{name}.%{name}.xml %exclude %{_datadir}/mimelnk/application/* %{_datadir}/thumbnailers/com.github.%{name}.%{name}.thumbnailer %{_datadir}/%{name} <---- %{_metainfodir}/com.github.%{name}.%{name}.appdata.xml
%files plugins %{_datadir}/%{name}/plugins
%files ui %{_datadir}/%{name}/ui
Change it to %dir %{_datadir}/%{name} to just own the directory
Also the main package should Requires the ui and plugins subpackages for them to be installed altogether.