Cortisone shot in knee 5 weeks before prostatectomy

I am scheduled for prostatectomy at Mass Gen Brigham on 3/31. My question is about cortisone shots. I have torn meniscus and almost bone on bone in right knee. I have had success with cortisone helping with pain and last shot was about a year ago, and knee is starting to act up again. I know I need to walk a lot after surgery to recover and prevent blood clots, so do not want my knee to stop me. My doctor said he thinks it is ok to get a cortisone shot 5+ weeks ahead of surgery, but it was a quick note on patient gateway with no long discussion. I went to “Dr. Google” and found, according to the Hospital for Special Surgery in NY, a statement that patients should not have cortisone shot any closer than 3 months before surgery due to immunosuppressive effect on healing. I do not want anything to interfere with recovery like an infection or slower healing, but also need my knee to work so I can walk. Does anyone have experience or advice about getting a cortisone shot in my knee 5 weeks before prostatectomy? If so, did it cause any issues with recovery or lead to an infection? Thanks!