The amount of water your dough will handle will vary based on your particular flour and environment—play it safe the first few bakes and work the water up gradually once you get a feel for the dough.
As I mentioned above, my best sourdough recipe is an extremely high hydration. If this is your first time working with this recipe, reduce the total water or hold water back during mixing to ensure your dough can handle the addition. The amount of water your dough will handle will vary based on your particular flour and environment—play it safe the first few bakes and work the water up gradually once you get a feel for the dough.