Non Convex Mesh Colliders even though there aren't any

I’m making an fps and when I shoot the bullets (which only has a box collider) it gives me an error saying non convex mesh colliders with non kinematic rigidbody is no longer supported. I can’t remove the rigid body because that is required

try clicking the error message, it’ll highlight the game object that has non-convex mesh collider. also, raycasting is more efficient: Unity - Scripting API: Physics.Raycast