Why didn’t the code noir work in haiti?

Code Noir was set by the French to help them regulate slavery and punishment. The Code required people that were colonized to provide food every week to the French. However, in Haiti, it did not function well as the people could only provide water and potatoes to the French. Also, the fact that the average lifespan of the "slaves" in Haiti was just 7 years didn't help the cause. 

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