https://bugzilla.redhat.com/show_bug.cgi?id=1745846
--- Comment #17 from Luya Tshimbalanga luya_tfz@thefinalzone.net --- desktop-file-validate will complain about the missing "Type" which only provides application, link and directory.
desktop-file-validate rpmbuild/SOURCES/f31-metadata.desktop rpmbuild/SOURCES/f31-metadata.desktop: error: required key "Type" in group "Desktop Entry" is not present
KDE SIG provided that workaround removing Type parameter for displaying wallpapers on Plasma on Fedora 25. https://src.fedoraproject.org/rpms/f25-backgrounds/c/9beaa478698cb6a0657034b...
You can discuss with them.