Knee pain

[Progress]

In between sets of front squats I got a sharp pain in my knee. I crouched down to floor and the pain came suddenly and it occurs on the inner part of the knee near the knee cap. I do all my squats ATF (full to the floor) and I haven't had an issue like this before.

I didn't do anymore squats after this and the pain seems to only come when I bend my knee.

Any ideas? I'm not going do any quad work until the pain subsides.