using old sonos amp with wired speakers S1 keeps wanting to revert to Sonos 2

Thanks

after plugging it in to a router with an Ethernet cable and going through all sorts of permutations 

I finally uninstalled S1 put it back in and it connected!! 

No that doesn’t work as it keeps reverting to S2. Anyway sorted it now by uninstalling and reinstalling S1.

Sonos devices don’t ‘move’ to either S1 or S2, in either direction, without a person clicking a button. Neither will the controller auto-update from S1 to S2 or backwards, but it will download new versions of itself. Some people have decided to turn off their OS’ feature that auto updates apps on their device for the Sonos, so that they can ‘stay’ on one release. But it never updates itself from one version of the controller to another version, without someone doing so.