If you're importing a podcast from Fireside.fm, you'll want to contact their customer support to set up a feed redirect. You can contact Fireside support through their support portal:
https://fireside.zendesk.com/hc/en-us/requests/new
You'll want to have handy:
- Your new Pinecast feed URL (you can find this on your podcast dashboard)
- Your podcast name and existing RSS feed URL
- The email address that you signed up for Fireside with