I changed the Base URL and now BookyAI says my saved key belongs to another address. What do I do?

This is a safety rule, new in version 1.9.16: a key is only ever sent to the address it was saved for. If you saved an OpenAI key and later type another server's address in "Base URL", BookyAI does not send your OpenAI key to that server. Paste the key that belongs to the new address into the key field and click Save; it is then used with that address. To go back to OpenAI (or Anthropic) itself, empty the Base URL field and save your OpenAI (or Anthropic) key again. Under the Base URL field the page always shows which host your requests and your key go to.