Upcoming defamation suit for ChatGPT?

Possible upcoming defamation suit against ChatGPT?

https://www.reuters.com/technology/australian-mayor-readies-worlds-first-defamation-lawsuit-over-chatgpt-content-2023-04-05/

The source of the information it was trained on is most likely liable for this, but how does that work when ChatGPT doesn't give the provenance of the information and rewrites the erroneous information in new ways?

The ability for OpenAI to Cherry Pick information for deletion is probably limited. In a case like this the pre-prompt (will talk about that on Friday) will probably say, "Don't mention this guy XXXX from Australia"