puttin this in gb&c casue you guys are so smart

so my freind asked me to fix his bass which had an accident theres been a crack in the neckwhich is getting bigger and so far hes been just putting duct tape over it

anyway so he asked me fo fix it and i said sure why not make me some money. so i clamp and glue the crack and fill it with wood filler sand it down smooth and when i put the strings on it the crack raised again

of course the strings would add tension on the neck and cause that so i try again...with the strings on this time but there is still a slight raise on the crack which wont go down.

now the neck seems steady as i adjusted everything else and set it up and everything but the raised part is buggin me should i even worry about it or can i just sand down that little edge and return it tomy freind