Weird texture after subdivision

I do designs for the Roblox community and earn some profit off of it, but I am confused on why my textures get weird when I subdivide and edit them. Refer to the image, before : .

and after I’m pretty new to blender and can’t seem to find a fix for it.

if you changed the size, make sure the scale is 1 before unwrapping, also you might need to re-unwrap