It depends on how mild the tweak is, and perhaps how different the result will be. I expect copyright protection for AI art will be very narrow, and likely only protect against direct copy/paste, or near-identical copies.
Art created by a generative AI platform (like Stability or Midjourney) is potentially copyrightable. The fact that an AI platoform was used does not, by itself, prevent the resulting art from receiving copyright protection. However, the art is only copyrightable if the human artist’s prompt contained sufficient expressive input.