There are still several weaknesses in the image generator. One of them, which many stumble over, is that DALL·E and even GPT itself do not process negations well. Whatever is mentioned in the prompt often ends up in the image. Words like “no” “not,” “without,” or “never” don’t work as expected. what you mention, will mostly end up in the image.
Instead, you have to practice some “DALL·E kung fu.” Rather than blocking something, it’s better to emphasize what you actually want in the image.
It’s also always useful to share the prompt that didn’t work. Others can then experiment with it.
This is the right DALL·E kung fu.
Here is a page that lists many known weaknesses, and some fixing tips, and there’s also a link to a shortened version.