I built a guitar for my buddy that lives 6 hours away so consequently Ive had to keep the guitar for about half a year after its finished. Unfortunately, I put the guitar on a wall mount stand, and it fell off the wall mount stand. When it fell, the side had a huge crack up the whole side. I reglued it and im trying to get it looking like it never happened. I sanded down to the bare wood and repainted most of the side where there was a split. My joint is fine, but the problem is that the wood around the crack is darker in color. I thought that it was because of the wood glue staying on the wood and discoloring the finished, so I resanded it down to the wood and clear coated it again. Same thing happened. I attached a picture. Let me know what is the cause of these darker spots and how I can fix it. Also the white spot is just where I sanded it through on accident, but now it doesn't matter cause Im going to have to redo it anyways to fix the dark spot.
https://ibb.co/kXVFytB