Duplicate episodes

I’m having a little annoying problem that maybe you can help me with. I listened to a public version of a podcast for awhile then converted to the full subscription version. I updated the rss and now the podcast has both the original non subscriber episodes and below that the longer full subscriber episodes. How do I make the non subscriber episodes go away? I now have 2 of every episode title, short and long. Thanks.

Could you unsubscribe from the public feed or stop it fetching new episodes from the public feed. I believe it’s the top option in podcast settings