No shit, Sherlock. Literally everything an AI makes is a derivative work of everything in the training dataset. It’s completely 100% impossible for any AI to create anything that isn’t copyright infringement unless every single thing in the data set is licensed in a way that is both (a) mutually-compatible and (b) allows derivative works to be made. In other words, if the dataset includes even a single copyleft thing then the resulting output had better be copyleft, if the dataset includes even a single proprietary thing then the owner of the resulting output had better comply with the terms of that proprietary license, and if the dataset contains both then you might as well delete the trained model and start over because legal use of the output is impossible.