This is a Textual Inversion to improve the quality of nai_v2.
In ComfyUI, you can use it by adding the following to the negative prompt.

"embedding:nai2_badgen"

Please replace the filename if it has been changed.

The usage method may differ for other UIs, so please check based on your own setup.

nai_v2 also includes low-quality tags such as the following, so try combining them with this embedding to create a more stable negative prompt:

"very displeasing, displeasing, bad quality, worst quality"