How do I set one solid

I've an issue with the collision filtering and I'm not sure where I got wrong. I've attached a picture to describe the issue. Based on this, red enemy (a solid with Bullet Behavior) will bounce off the Stairs upon collision. I want the Player to be able to move onto (overlap) the Stairs without disabling the Stairs collision with the Red enemy. I tried disabling the Stair collision upon Player’s overlap but this will only cause the Red Enemy to move through the Stairs. So I tried using the Solid tags on Player, Stairs and enemy but now the Player cannot overlap or move onto the Stairs.

My actual WIP game also has difficulties reading the Solid tag filter too, which is weird.

Also, this is helping a lot if we can see your code C:

Here is something that can maybe help you

construct.net/en/forum/construct-3/how-do-i-8/tags-using-behavior-solid-177814