All I can say is this, if they are not loose and the compression washer is in place then you will just have to live with it, nothing broken, so dont fix it. You dont say which peg it is,, but if it is just wobble most of the pegs do this, I have inserted spring washers to take up some of the wobble, but they get tough to raise up and down if you make it to tight..,,,, this is what worked for me,, good luck
Boabs