I recently decided to make a mod, my first in fact. I won't spoil much about what I'm planning, but it basically requires changing the .bgsm file directory on a base feral ghoul mesh. I have been watching plenty of videos (primary example: "How to get your own textures and materials into Fallout 4" by Gambsmoore/Mikemoore), but when I get to the part where I need to change the .bgsm directory, I get a message saying, "This cannot currently be undone," and I think it has something to do with the reason why the material on the mesh doesn't change at all. I've followed the exact steps provided in the video and even went overkill on the data folder directory for Nifskope, so what went wrong?