Connected my spotify account to Sonos on my iphone, now the spotify app itself doesn't work anymore.

[Raiden210484]

Hey everybody.

As explained, i'm using an iphone 6+, so i've got the Sonos app and the Spotify app. Yesterday i connected (in my Sonos app) my Spotify account to Sonos to be able to stream music over my system. But now i can't connect to mySpotify app anymore (still on the same phone). I can't connect because it says "email adress and account already in use". I don't understand this. I'm using only one account on one device, just that i connected spotify account with Sonos. Can somebody help me please?
Thank you