title: Flutter Error: The current Flutter SDK version is 2.1.0-dev.0.0.flutter-be6309690f
body: <p>I've just upgraded my flutter, after upgradation I am unable to run any flutter project on my Android Studio. I am getting this error message. </p>
  
  <pre><code>The current Dart SDK version is 2.1.0-dev.0.0.flutter-be6309690f.
  
  Because buddy depends on flutter_built_redux 0.4.5 which requires SDK 
  version &gt;=1.19.0 &lt;2.0.0, version solving failed.                                                  
  pub get failed (1)
  </code></pre>
  
  <p>How can I downgrade Dart or how can I resolve this issue, I am running android studio on mac. </p>
  
  <p>I've tried by changing flutter channels <code>dev</code> and <code>master</code> but it doesn't make a difference. </p>
  
  <p>flutter doctor -v result: </p>
  
  <pre><code>[✓] Flutter (Channel dev, v0.6.0, on Mac OS X 10.13.4 17E202, locale en-IN)
  • Flutter version 0.6.0 at /Users/pro/Downloads/flutter
  • Framework revision 9299c02cf7 (5 days ago), 2018-08-16 00:35:12 +0200
  • Engine revision e3687f70c7
  • Dart version 2.1.0-dev.0.0.flutter-be6309690f
  
  [✓] Android toolchain - develop for Android devices (Android SDK 27.0.3)
    • Android SDK at /Users/pro/Library/Android/sdk
    • Android NDK location not configured (optional; useful for native 
       profiling support)
    • Platform android-27, build-tools 27.0.3
    • Java binary at: /Applications/Android 
       Studio.app/Contents/jre/jdk/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 1.8.0_152-release- 
       1024-b01)
  • All Android licenses accepted.
  
  [✓] iOS toolchain - develop for iOS devices (Xcode 9.4.1)
  • Xcode at /Applications/Xcode.app/Contents/Developer
  • Xcode 9.4.1, Build version 9F2000
  • ios-deploy 1.9.2
  • CocoaPods version 1.5.0
  
  [✓] Android Studio (version 3.1)
  • Android Studio at /Applications/Android Studio.app/Contents
  • Flutter plugin version 27.1.1
  • Dart plugin version 173.4700
  • Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1024-b01)
  
  [!] Connected devices
  ! No devices available
  </code></pre>