Artist duplicates

For some reason Taylor Swift is showing up twice on my artist list so the original has 2,986 mins this year but now that’s stopped counting streams and a duplicate has started counting the streams instead the duplicate has 1,434 mins this year why has this happened? Can they be merged together again? The same thing has happened to me with some of her songs it’s not even because of the TTPD anthology cuz the album art for the songs are both for the original edition of TTPD