If you're importing a podcast from Pippa, you'll need to contact their customer support to set up a feed redirect. To reach Pippa, log in to your dashboard and use the chat icon in the bottom right to contact support.
You'll want to have handy:
Your new Pinecast RSS feed URL (you can find this on your podcast dashboard)
The name of your podcast
The email address that you used to sign up for Pippa