Hi there, Joe! You can let your dough rise for too long, this is called "over-proofing." Which can lead to a collapsed loaf, or a dense and crumbly texture. While a recipe will give you an idea of how long the dough should take to rise, you want to use this as a guideline and go more so by how your dough looks and feels in comparison to the descriptors given in the recipe. We hope this helps! 

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