How to mark all Apple Podcast episodes as unplayed

I can mark all as played. But I cannot undo this. I am trying to start over at the beginning of a series of podcasts that are currently over 800. I do not have the time to manually go through and individually mark each and every episode as unplayed. How do I mark them all from that creator as unplayed. I have tried deleting and reinstalling the app. I have unfollowed multiple times this creator. Every time I follow it shows my past episodes as played and not unplayed.

[Re-Titled by Moderator]