It is not recommended to eat, otherwise it may cause food poisoning.

Reason:

When beans are left for more than 24 hours,

the nitrite content increases greatly. High doses of nitrite can reduce the content of hemoglobin in the beans. The oxidation of divalent iron to trivalent iron produces a large amount of methemoglobin, which causes it to lose its ability to carry and release oxygen, causing hypoxia in systemic tissues and producing enterogenic cyanosis.