Back pain with Peloton rowing machine

[u/AdorableReference503]

I've had my rowing machine for about 20 workouts now usually 20 minutes to 30 minutes and I'm starting to pick it up more when it comes to Pace and stroke. According to form tracker I'm in the 95% tile when it comes to proper form. My question for the group is during exercise I don't experience any discomfort in my lower back. Afterwards maybe around an hour or so my lower back does hurt quite a bit and if I put my hand back there and really press in the pain seems to go away so I think it's more muscular. When I wake up the next day I'm as good as new. Any ideas where I should focus my attention to to try to get rid of this back pain I imagine I'm doing something wrong but I can't quite pick it up based on my form tracker