Unable to add existing (approval pending) Host to second podcast

[TobiasDax]

When i tried to add the hosts for https://people.pinepods.online/podcast/433999 i ran into the following error message:
Error adding host: error updating approval key: UNIQUE constraint failed: host_podcasts.approval_key

i guess this is because i tried to add the exact same host that i had added to https://people.pinepods.online/podcast/7015367

[TobiasDax]

This service also needs a way to add an existing person to a podcast, this feuture seems to be missing completely and would be great, especially for guests who might appear on multiple podcasts.

A simple dropdown list could work for the moment