Unplug all your S1 devices, then use the S2 app to set up a new system.  If you need to, uninstall or reset the S2 app to ensure a clean install.

Your profile doesn’t say but which of your current Sonos aren’t S2 compatible?

https://support.sonos.com/en-us/article/sonos-s2-compatibility

thanks jgarie and stanley

i’ll try the unplugging idea, should work thinking about it logically. thanks

on my current network i have 16 devices, of which only 4 sonos 1’s are s2 compatable.

Andy

Since you haven’t put your devices on your profile, and just out of curiosity, what are those other 12 devices, that are unable to run S2?

I’m curious also as you say you have an extensive S1 system. Are the other devices all Play 5 Gen 1’s or Zone Players and/or Connects Gen1.