Generative AI assets is a VERY sensitive topic in the gaming industry and I HIGHLY suggest to stray away from it, even if it's allowed on Itch or other platforms; Clair Obscur was stripped from their GOTY award for using placeholder background newspaper Gen AI art that got patched 1 week from release, so it's definitely a touchy subject.
I know you meant no harm in using it (even if you were aware or unaware), and I would love to see your next works without AI! Game development is a learning process, so don't get discouraged about this and continue to games!
P.S. if your older works do have AI assets, I would suggest removing them as well. If ever you're skeptical or unsure, you can always turn to the community (i.e. Itch community, Game Jam Discords, art friends) to check on it! I'm sure there are tons of people out there who are willing to help