React native Android SyntaxError: Attempted to redefine property 'key'

Question

I get the following error on Emulators (tested Genymotion and google Stock Emulator) and on a physical device (Samsung S4) after running react-native run-android

Answer 1

Encountered the same error on v0.49. Spent a lot of time and finally found that there are duplicates in my css declaration:

logo: {
    flex:.3,
    height: 120, 
    marginBottom: 10,
},

logo: {
    ...styText,
    marginTop: 10
},

just removed the second declaration fixed the error.