Exception Dump SO android ViewPager

java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.Object android.util.SparseArray.get(int)' on a null object reference
  at android.support.v4.app.FragmentManagerImpl.getFragment(FragmentManager.java:902)
  at android.support.v4.app.FragmentStatePagerAdapter.restoreState(FragmentStatePagerAdapter.java:216)
  at android.support.v4.view.ViewPager.onRestoreInstanceState(ViewPager.java:1453)
  at android.view.View.dispatchRestoreInstanceState(View.java:15662)
  at android.view.ViewGroup.dispatchRestoreInstanceState(ViewGroup.java:3270)
  at android.view.View.restoreHierarchyState(View.java:15640)
  at android.support.v4.app.Fragment.restoreViewState(Fragment.java:510)
  at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1445)
  at android.support.v4.app.FragmentManagerImpl.moveFragmentToExpectedState(FragmentManager.java:1740)
  at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1809)
  at android.support.v4.app.BackStackRecord.executeOps(BackStackRecord.java:799)
  at android.support.v4.app.FragmentManagerImpl.executeOps(FragmentManager.java:2580)
  at android.support.v4.app.FragmentManagerImpl.executeOpsTogether(FragmentManager.java:2367)
  at android.support.v4.app.FragmentManagerImpl.removeRedundantOperationsAndExecute(FragmentManager.java:2322)
  at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:2229)
  at android.support.v4.app.FragmentManagerImpl$1.run(FragmentManager.java:700)
  at android.os.Handler.handleCallback(Handler.java:754)
  at android.os.Handler.dispatchMessage(Handler.java:95)
  at android.os.Looper.loop(Looper.java:163)
  at android.app.ActivityThread.main(ActivityThread.java:6321)
  at java.lang.reflect.Method.invoke(Native Method)
  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:880)
  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:770)