DeviantArt has decided your artwork there is fair game to be used in their new AI generator by default. You have to go to an obscure form to opt-out and requires 10 days to be reviewed. I am beyond frustrated with them and the timing of this. If you would like to opt-out, the form is here https://docs.google.com/forms/d/e/1FAIpQLScBl3RIkgoVJh89rWOSd-bz_FdlCZGSUho4ADhG2rmCq3dVPg/viewform If you would like to read their press release