As it seems the bootloader was updated (version 501) but the rest wasn’t (version 8).
You can try downloading device OS system part1 and part2 and flash them one by one like this
particle flash --usb photon-system-part1@1.4.4.bin -v
particle flash --usb photon-system-part2@1.4.4.bin -v
and run particle serial inspect again.