Soak the navy beans in water overnight, then drain and rinse them.

In a bowl, mix together the ketchup, water, brown sugar, mustard, Worcestershire sauce, smoked paprika, salt, and pepper.

Place the soaked beans, diced onion, minced garlic, and optional bacon in the crockpot.

Pour the sauce mixture over the beans and stir to combine.

Cover and cook on low for 8 hours or high for 4 hours until the beans are tender.