I have same issue at L-4 - L-5 and S-1. One of top neurosurgeons in eastern PA said that my narrowing can contribute towards the numbness in both feet but is not the actual cause of my PN. In 2020, Mayo Clinic confirmed as well. But, even now, I touch the lower back areas, strong tingle in ankles and feet. Hard to dispute the opinions of experts. So, no surgery will remedy my PN. And yes, I have lower back pain. Again, each case is different. Wish you the best.