help please

hello

ive been working on my first ever 2D game.
im using tilemap to make levels, but my stairs have a boxcollider (as you can see in the picture). im using a tilemap collider, which have been working just fine before.

how do i change that?
ps: to make the stair i made a boxsprite, and cut it in half. maybe thats the reason, if then how do i cut the hitbox too?

thanks a lot

i found it out