iTunes Remastered Song

I am trying to purchase a remastered version of a song. I currently own the same song but it is not the remastered version. When I try and purchase the new remastered version iTunes says I already own it, which I don't...I have the non remastered version. I have tried to delete the non remastered version from my library and I still get a message that I already own it and do I want to re download it. I re download it but it re downloads the non remastered version. Is there a way to fix this?