Upgrade rak2246 4.2 gateway os to latest through openwrt gui

Hi i followed the steps to upgrade through flashing image https://artifacts.chirpstack.io/downloads/chirpstack-gateway-os/4.6.2/raspberrypi/bcm27xx/bcm2708/chirpstack-gateway-os-4.6.2-full-bcm27xx-bcm2708-rpi-squashfs-sysupgrade.img.gz

it was uploaded and completed successfully but the version on system info never changed.

Should i use some other image note my current image is the provided in this post

Thank you all