title: Duplicate value for resource 'attr/font' with config "
body: <p>I really do now know why I got this <code>error</code> and how can I solve it.
  Actually I am not sure What I did right before I got this <code>error</code>.</p>
  
  <blockquote>
    <p>Error Msg:
    /Users/hyun/.gradle/caches/transforms-1/files-1.1/appcompat-v7-27.0.1.arr/25699caf34fef6313d6ec32013a1a117f/res/values/values.xml
    error:duplicate value for resource 'attr/font' with config".
    error: resource previously defined here</p>
    
    <p>/Users/hyun/Desktop/Laftel-Android/app/build/intermediates/incremental/mergeDbugResources/merged.dir/values/values.xml
    duplicate value for resource 'attr/font' with config ".
    resource previously defined here.</p>
    
    <p>Java.util.concurrent.ExecutionException:com.android.tools.appt2.Aapt2Exception:AAPT2 error: check for details Execution failed for task ':app::mergeDebugResources'.
    Error: java.utilconcurrentExcutionException:com.android.tools.aapt2.Aapt2Exception : AAPT2 error: check logs for details</p>
  </blockquote>