stacktrace

05-09 19:06:30.928: E/AndroidRuntime(2806): FATAL EXCEPTION: main
05-09 19:06:30.928: E/AndroidRuntime(2806): Process: com.example.try_masterdetailflow, PID: 2806
05-09 19:06:30.928: E/AndroidRuntime(2806): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.try_masterdetailflow/com.example.try_masterdetail.WebsiteListActivity}: java.lang.RuntimeException: enableOfflineStore() called multiple times.
05-09 19:06:30.928: E/AndroidRuntime(2806): 	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2195)
05-09 19:06:30.928: E/AndroidRuntime(2806): 	at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245)
05-09 19:06:30.928: E/AndroidRuntime(2806): 	at android.app.ActivityThread.access$800(ActivityThread.java:135)
05-09 19:06:30.928: E/AndroidRuntime(2806): 	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
05-09 19:06:30.928: E/AndroidRuntime(2806): 	at android.os.Handler.dispatchMessage(Handler.java:102)
05-09 19:06:30.928: E/AndroidRuntime(2806): 	at android.os.Looper.loop(Looper.java:136)
05-09 19:06:30.928: E/AndroidRuntime(2806): 	at android.app.ActivityThread.main(ActivityThread.java:5017)
05-09 19:06:30.928: E/AndroidRuntime(2806): 	at java.lang.reflect.Method.invokeNative(Native Method)
05-09 19:06:30.928: E/AndroidRuntime(2806): 	at java.lang.reflect.Method.invoke(Method.java:515)
05-09 19:06:30.928: E/AndroidRuntime(2806): 	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
05-09 19:06:30.928: E/AndroidRuntime(2806): 	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
05-09 19:06:30.928: E/AndroidRuntime(2806): 	at dalvik.system.NativeStart.main(Native Method)
05-09 19:06:30.928: E/AndroidRuntime(2806): Caused by: java.lang.RuntimeException: enableOfflineStore() called multiple times.
05-09 19:06:30.928: E/AndroidRuntime(2806): 	at com.parse.OfflineStore.enableOfflineStore(OfflineStore.java:40)
05-09 19:06:30.928: E/AndroidRuntime(2806): 	at com.parse.Parse.enableLocalDatastore(Parse.java:161)
05-09 19:06:30.928: E/AndroidRuntime(2806): 	at com.example.try_masterdetail.WebsiteListActivity.onCreate(WebsiteListActivity.java:60)
05-09 19:06:30.928: E/AndroidRuntime(2806): 	at android.app.Activity.performCreate(Activity.java:5231)
05-09 19:06:30.928: E/AndroidRuntime(2806): 	at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
05-09 19:06:30.928: E/AndroidRuntime(2806): 	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2159)
05-09 19:06:30.928: E/AndroidRuntime(2806): 	... 11 more