help with apple music

I got a question on my iOs device and it asked me if I wanted to keep the music I already had on my device and I chose yes. Is there a way to change that?

Forum: 

Your Apple Music question.

Hi Sasha, Did you get this message because your free Apple Music trial ran out? Never have seen that question.

no

I have free trial until 9 april this year and am not planning on cancelling it or anything. When I subscribed it asked me if I wanted to keep the music I already had or if I wanted to erase that and I said to keep it but now, I have duplicates of my playlists wich is really not what I wanted.