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hi, I am trying om-next to create a new project, and I used to use version alpha32, and today upgrade to alpha40


but it comes to the react warning message, flattenChildren(...): Encountered two children with the same key, .$undefined`. Child keys must be unique; when two children share a key, only the first child will be used.`


it seems it comes from the upgrade of react from 0.14 to 15, but I checked the examples of om-next, it does not set the react key frequently...what's the trick here?


currently, I created the components following the examples, use defui and factory, but it always comes the react flattenchildren message, even I change the content of component to the simple text string