Update firmware of new satellite Deco M4
I have a 2-pack Deco M4 initially installed and I updated the firmware to the latest one 2 days ago (1.5.0 Build 20210511 Rel. 34580)
Today, I bought another M4 unit and installed it as a new satellite Deco upstairs. But the last Deco has an outdated firmware (1.1.8 Build 20191102 Rel. 58333).
I cannot find a way to sync the firmwares of all the Decos. It bothers me a lot. Tried updating thru the app and it keeps telling me that I have the latest firmware.