obect doesnt move?

https://preview.redd.it/bghlomal437h1.png?width=1693&format=png&auto=webp&s=767b1a88b185b6588f9c68f608bb1a9d3186fdad

i started making a shoot em up by using premade code by gdev. they made this black bar(gameboundary) so player doesnt go off screen, but i cant move or delete it, why n how to fix?