Varity set_wallpaper script only change main screen wallpaper under KDE Plasma

set_wallpaper.part

        QT_SELECT=5 $qdbus_command org.kde.plasmashell /PlasmaShell org.kde.PlasmaShell.evaluateScript "
        for (i in activities()) {
            activityID = activities()[i];
            desktops = desktopsForActivity(activityID)
            for (j in desktops) {
                d = desktops[j];
                if (d.screen == 0) {
                    d.wallpaperPlugin = 'org.kde.image';
                    d.currentConfigGroup = Array('Wallpaper', 'org.kde.image', 'General');
                    d.writeConfig('Image', 'file://""$WP""')
                }
            }
        }
        "