Failed propType: Invalid prop `styles` supplied to `TransitionMotion` when upgrading to 0.4.1 from 0.3.1

Is the prop name no longer styles?

Additionally, I get this error:

TypeError: destStyles.map is not a function
    at getInitialState (http://localhost:3001/assets/bundles/app.self.js?body=1:38055:63)
    at new Constructor (http://localhost:3001/assets/bundles/app.self.js?body=1:43848:54)
    at ReactCompositeComponentMixin.mountComponent (http://localhost:3001/assets/bundles/app.self.js?body=1:44286:18)
    at wrapper [as mountComponent] (http://localhost:3001/assets/bundles/app.self.js?body=1:51193:21)
    at Object.ReactReconciler.mountComponent (http://localhost:3001/assets/bundles/app.self.js?body=1:51823:35)
    at ReactCompositeComponentMixin.mountComponent (http://localhost:3001/assets/bundles/app.self.js?body=1:44363:34)
    at wrapper [as mountComponent] (http://localhost:3001/assets/bundles/app.self.js?body=1:51193:21)
    at Object.ReactReconciler.mountComponent (http://localhost:3001/assets/bundles/app.self.js?body=1:51823:35)
    at ReactDOMComponent.ReactMultiChild.Mixin.mountChildren (http://localhost:3001/assets/bundles/app.self.js?body=1:50520:44)
    at ReactDOMComponent.Mixin._createContentMarkup (http://localhost:3001/assets/bundles/app.self.js?body=1:45605:32)

[Egor-Koldasov]

For google: the key should be a string, I didn’t notice my that my key was a number.

[etiennejcharles]

Why do I get the feeling that this should mentioned as a error coming from “React-Motion” - Il create a PR when I get the chance ~ Shouldn’t have to look on google to find that!