Remove these two packages: vulkan-mesa-device-select & lib32-vulkan-mesa-device-select, and then run pacman -Syu again.
sudo pacman -Rdd vulkan-mesa-device-select lib32-vulkan-mesa-device-select
Remove these two packages: vulkan-mesa-device-select & lib32-vulkan-mesa-device-select, and then run pacman -Syu again.