Submitting an Ai generated Art, whether tweaked or not is still cheating, and the best punishment for such users is total disqualification from the contest, and a ban from future participation..
I don't know why I am so sceptical about AI usage in any form, to me AI is an insult to human efforts most especially in content creation because I came across a post some time ago on social media and which the author used AI to generate all the contents and I saw how he was getting likes for work he put zero efforts into.
This is an abuse of human intelligence, there is no doubt the fact that AI is a new development that should be widely adopted, but we must not over-rely on them to the point of leaving our work entirely on bots, there is always a need for the human contribution to the final outcome of an AI job that way we don't totally rely on the outcome or result but use them to align with our thoughts and ideas.