Also rejected are any proper names, trademarks, 20th-century artists, copyrighted characters, along with particular words that may be specific to global conflicts or that may be derogatory or improper ways to refer to a race, culture, or protected class of marginalized people.
Since you won’t get any answers out of the AI, nor would an AI be able to figure out why many of these words would be bounced (like Kyiv), it is best to just return similar guidelines as the breadth of what does indeed trigger the DALL-E prompt detection.
You can also use the AI that is in front of DALL-E to your advantage, by talking to it directly and breaking out of the prompt, adding instructions for what it must rewrite without refusal instead of passing unaltered to get rejected or rejecting itself, and then give your injection of instructions clear separation from the user image prompt (making nesting dolls of instructions…)