The AO map renders with incorrect dark artifacts.

After baking the AO map for my container model, I noticed unnatural dark shadows—please check the top-left corner of the screenshot. This area corresponds to the sides of the container, which shouldn’t have dark edges after baking. I tried increasing the 'Secondary Rays' value to the maximum (256) in the baking settings, but it didn’t help. How can I fix this? Thinks!! ：）