there's this seam of "shadows" around the neck

https://preview.redd.it/b060d30vbond1.png?width=1920&format=png&auto=webp&s=67c79bada22a4a41bf80213ce1c9cd3184e194de

https://preview.redd.it/nnx0l20vbond1.png?width=1920&format=png&auto=webp&s=498f067e923e33dbba6d553d9368128789361f1f

https://preview.redd.it/z3dn640vbond1.png?width=1920&format=png&auto=webp&s=ec12534b39c4b4beebde73431e97a1d020608fca

im not sure how to get rid of it