Weird Shading issue

Hi, can anyone tell me what causes this dark edges on these meshes? the topology is clean, never had this issue before.This render is with 2 subdiv iterations.

solved, just redid the meshes

Группы сглаживания? - Не! Не слышали!

I think it's troubles of smoothing groups. You can try to use "Smooth" modifier

i just modeled them again :D thanks for the tip though i will pay attention next time