Question Is there a way to prevent my character colliding with background?

I wanted to make Cinemachine camera not go further than the Terrain, so I set Sky, which has a Composite Collider that uses Tilemap Collider, as a confiner. Player is in default layer and has a Box collider.

When I start the game, Player collides with Sky and gets pushed off the ledge of Terrain. How do I prevent this from happening?

https://imgur.com/a/Jd3uvtK

 

In "Project Settings/Physics 2D" there is a table of checkboxes for which layers can collide with what. Place the collider you use for camera confinement in a separate layer and mark the checkboxes accordingly.