Manual way to remove a Podcast URL that is now a 404 ?

[Nightdive99]

I have a Podcast feed that is now a 404.
My clients (Antennapod and KATS) always throw an error if I manually sync in the client and they reject the broken podcast url.
That means I can't add+remove the podcast in the client and sync that back to the server.

I tried to redirect the broken URL to my http server to a valid rss file but the clients are of course unhappy with the incorrect ssl certificate.
Removing gpoddersync from nextcloud doesn't remove the database....

Does anyone have an idea how I could get rid this broken podcast URL ?

[JonOfUs]

Currently there is no way to reset the data apart from manually altering the database.

You could talk to the API directly to mark the 404 feed as removed. This way, it should no longer be synchronized to Kasts and Antennapod. But for this it's easiest to use the terminal/command line.
The command for this is:
curl -u username:password -H "Content-Type: application/json" -X POST -d '{"add": [], "remove": ["https://example.com/feed.rss"]}' https://cloud.example.com/index.php/apps/gpoddersync/subscription_change/create
Just replace username&password with your Nextcloud login data, replace https://example.com/feed.rss with the problematic feed URL and cloud.example.com with your Nextcloud's domain.
This command should work the same on Linux, Windows and Mac.

[Nightdive99]

Thank you very much for the working solution !
I tried nearly the same before but I used my general Account password and not an application specfic one and that didn't work.
I fixed my problem with your hint !