I recommend not to use negatives in a prompt with AI as the negative itself makes the outcome of it being generated more likely.
Example:
“Do not generate a dog!”
→ The AI sees the word “dog” which it has been trained on generating pictures of dogs.
It also sees the words “Do no generate a” which often appear in other images as well, making the final output highly likely to be of a dog.
The solution?
Most open source image generation models support a negative prompt, meaning what you don’t want in the image.
If you write “Dog” in the negative prompt, there will pretty much never be a dog generated in the image.
I’m not sure if DALLE supports negative prompts and if not - you can always look up open source image generation models.
Cheers. 