In terminal use
sudo pacman -Syu --overwrite '/usr/share/sddm/themes/Sweet/assets/bg.jpg'
Fixed
Also conflict with plasma5-themes-sweet-full-git
error: failed to commit transaction (conflicting files)
/var/cache/garuda-tools/garuda-chroots/buildiso/hyprland/x86_64/desktopfs/usr/share/sddm/themes/Sweet/assets/bg.jpg exists in both 'plasma5-themes-sweet-full-git' and 'garuda-hyprland-settings'
Reverted this change in garuda-hyprland-settings-0.4.87