Question about "TP-Link Archer C6 v2" Flash using web interface

I am new to OpenWrt.
My router is : https://openwrt.org/toh/tp-link/archer_c6_v2

Under "Flash using web interface" topic, I see the following:
1.3.6 - 19.07.4 flashes successfully, 21.02, 23.05 flashes successfully

But my current firmware is Archer C6(EU)_V2_1.3.7 Build 20220613
Same as in Tp-Link website : https://www.tp-link.com/en/support/download/archer-c6/v2/#Firmware

So how do I proceed in this case? Do I have to wait? Do I have to proceed with Web flasher ?

If your OEM firmware supports it, simply upload openwrt-ath79-generic-tplink_archer-c6-v2-squashfs-factory.bin via the router Web interface.

If the fw is rejected lets look into it.

Have you tried to flash 23.05 with the new firmware?

fw might be rejected if the device is of yet unseen (regional) variation.
https://git.openwrt.org/?p=project/firmware-utils.git;a=blob;f=src/tplink-safeloader.c;h=9b2f7d080226015693c5a3dd775c685ff017933b;hb=HEAD#l1257
I dont own C6, but others were fine with all OEM upgrades in place.

Will try it and let you further details..ASAP

not yet..will try it and let you know