I would get some X-rays to verify you don't have any spinal conditions contributing to your issue. If any abnormalities are present I would obviously follow that up and not do anything until those are handled.
If that is not the case, then proceed. I think you have patellar tendonitis, which is an overuse injury and is significant as it's a sign you're not doing something right. This could be something related to your lifting, to exercise and play outside of the gym, or you could have flat feet, a condition which makes you more susceptible to patellar tendonitis.
Rest is the only solution to correct patellar tendonitis. That doesn't mean deload, it means do not do this activity. 7-10 days you should be good to go.