Execution failed for task ':app:dexDebug' Android Studio

Question

The application was able to execute before updating my android studio,this is the error I am getting:

Error:Execution failed for task \':app:dexDebug\'.
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Answer 1

I fixed that adding:

compile ('com.facebook.android:facebook-android-sdk:3.22.0@aar'){ exclude module: 'support-v4' }