What did I do wrong?

100g of starter- 375g of water- 500g of bread flour.

After mixing, I let it rest for a little over an hour. Then, I did 2-3 sets of stretch and folds, followed by 2-3 sets of coil folds, all 30 minutes apart. I then roughly shaped it and left it in the bowl on the counter overnight, approximately 7 hours. This is how it was this morning. Did I over ferment?