For some reason the main node on my Deco S4 decided it didn't want to communicate with anyone, whether wired or wifi. After power cycling and reset failed to correct the problem, I figured my only recourse was to remove the device (supposedly resetting it to factory specs) and reconfiguring from scratch. But when I entered the same SSID, it told me it was already in use and I would have to create a new one. Is there a way to make the system forget the old SSID so I can reuse it? Thanks.