You flash the firmware for your model, the WR940N v6:
openwrt-18.06.0-ar71xx-tiny-tl-wr940n-v6-squashfs-factory
and
openwrt-18.06.0-ar71xx-tiny-tl-wr940n-v6-squashfs-factory-XX
You flash the firmware for your model, the WR940N v6:
openwrt-18.06.0-ar71xx-tiny-tl-wr940n-v6-squashfs-factory
and
openwrt-18.06.0-ar71xx-tiny-tl-wr940n-v6-squashfs-factory-XX