Disc degeneration may lead to back pain
however there are too many pain geneartors in spine so we need to know more about your complaints and the MRI
images to tell you exactly what is the possible reason for back pain. Although you have disc space at S1-S2 but its not necessary that it is the pain generator. Usually there is no mtion at this level so it may not cause any back pain. Few other reasons could be last mobile lumbar level disc prolapse
or sacroiliac joint
inflamation. I would suggest to get back wth more detaled history and your MRI images. Thanks.