no idea but, avoid movements that cause pain, that's probably the most effective/important advice we can give, other than getting it checked out.
when I was squatting deep way back, my hip was getting worse, knees more inflamed etc, so i moved to half squat -> that fixed it.
if I had to move from half squat to something else (like lunges/stepups or rdl/back extension), I would have.
avoiding pain is a good strategy/approach.
but knee cap issues can get pretty bad, you need to be very careful.
