Hello

I have reccently added 2 new Deco m9  plus to my mesh of 3 deco M9 plus

The 3 former ones are v1 and their Firmware  is1.6.4, and gets upgraded thru the app when there are new releases

The 2 new ones are v2 and I cannot get their firmware changed from 1.2.12 Build 2019104 Rel. 42025

I tried : 

-from the deco App - It says up to date

-from the M9 utility program, it says "Could not find the main deco..."

I then tried using one of the 2 new V2 as a main deco, recreating a network and I have the exact same result

I tried removing forewalls, .... (all what TPLink advises when the message could not find.... comes out, but no success.

As a consequence,

-I see no device copnnected to the new deco (v2) in the deco App, no IP address for the new decos (v2).

-even if connected via ethernet backhaul, the 2 new deco show WIFI

...and it does not seem those 2 new deco increase my mesh

Could someone help me?

I have posted the question to TP Link support but I have received no answer

Thank you