question, how to correct the answer to: "Is this score based on existing music?"

Hi: I noticed the interface has changed a bit for uploading. First question, Is this score based on existing music? (e.g. The Beatles, Beethoven).

I said no for the last couple of uploads, but now I think I should have said yes. And then I saw it classified as "original" in the listing.

So, having noted several as "not" based on existing music, how's the best way to correct this?

Thanks.