I made a layer for them, i spawn them on the map on the “projectile” layer. And in the project settings, physics I set the projectile layer to not collide with each other. But they still do! What am i doing wrong?
I use a prefab, so these projectiles have the same properties:

and here are my project settings:

Thanks in advance.
Make sure your two projectiles are layered as “projectile”, have a rigidbody attached, and a collider:
In the physics project settings make sure you ticked the correct one:
@HenBOMB I use a prefab, so these projectiles have the same properties:
and here are my project settings: