remove broken items in /usr/share/app-install/desktop/
then
/usr/share/gnome-menus/update-gnome-menus-cache /usr/share/applications/ > /usr/share/applications/desktop.en_US.utf8.cache
remove broken items in /usr/share/app-install/desktop/
then
/usr/share/gnome-menus/update-gnome-menus-cache /usr/share/applications/ > /usr/share/applications/desktop.en_US.utf8.cache