Why this exception is coming ?java.lang.IllegalStateException

Question

My code :

@Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        view = inflater.inflate(R.layout.fragment_one, container, false);
        RecyclerView recyclerView = (RecyclerView)view.findViewById(R.id.recyclerView);
        RecyclerView.LayoutManager layoutManager = new LinearLayoutManager(getActivity());
        recyclerView.setLayoutManager(layoutManager);
        recyclerView.setAdapter(mAdapter);
        return view;
    }

Exception :

java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first. at android.view.ViewGroup.addViewInner(ViewGroup.java:3509) at android.view.ViewGroup.addView(ViewGroup.java:3380) at android.view.ViewGroup.addView(ViewGroup.java:3325) at android.support.v7.widget.RecyclerView$5.addView(RecyclerView.java:591) at android.support.v7.widget.ChildHelper.addView(ChildHelper.java:107) at android.support.v7.widget.RecyclerView$LayoutManager.addViewInt(RecyclerView.java:6695) at android.support.v7.widget.RecyclerView$LayoutManager.addView(RecyclerView.java:6653) at android.support.v7.widget.RecyclerView$LayoutManager.addView(RecyclerView.java:6641) at android.support.v7.widget.LinearLayoutManager.layoutChunk(LinearLayoutManager.java:1398) at android.support.v7.widget.LinearLayoutManager.fill(LinearLayoutManager.java:1347) at android.support.v7.widget.LinearLayoutManager.onLayoutChildren(LinearLayoutManager.java:574) at android.support.v7.widget.RecyclerView.dispatchLayoutStep2(RecyclerView.java:3003) at android.support.v7.widget.RecyclerView.dispatchLayout(RecyclerView.java:2881) at android.support.v7.widget.RecyclerView.onLayout(RecyclerView.java:3265) at android.view.View.layout(View.java:14471) at android.view.ViewGroup.layout(ViewGroup.java:4562) at android.widget.RelativeLayout.onLayout(RelativeLayout.java:1076) at android.view.View.layout(View.java:14471) at android.view.ViewGroup.layout(ViewGroup.java:4562) at android.support.v4.view.ViewPager.onLayout(ViewPager.java:1695) at android.view.View.layout(View.java:14471) at android.view.ViewGroup.layout(ViewGroup.java:4562) at android.support.design.widget.HeaderScrollingViewBehavior.layoutChild(HeaderScrollingViewBehavior.java:122) at android.support.design.widget.ViewOffsetBehavior.onLayoutChild(ViewOffsetBehavior.java:42) at android.support.design.widget.AppBarLayout$ScrollingViewBehavior.onLayoutChild(AppBarLayout.java:1149) at android.support.design.widget.CoordinatorLayout.onLayout(CoordinatorLayout.java:810) at android.view.View.layout(View.java:14471) at android.view.ViewGroup.layout(ViewGroup.java:4562) at android.widget.FrameLayout.onLayout(FrameLayout.java:448) at android.view.View.layout(View.java:14471) at android.view.ViewGroup.layout(ViewGroup.java:4562) at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1671) at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1525) at android.widget.LinearLayout.onLayout(LinearLayout.java:1434) at android.view.View.layout(View.java:14471) at android.view.ViewGroup.layout(ViewGroup.java:4562) at android.widget.FrameLayout.onLayout(FrameLayout.java:448) at android.view.View.layout(View.java:14471) at android.view.ViewGroup.layout(ViewGroup.java:4562) at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1671) at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1525) at android.widget.LinearLayout.onLayout(LinearLayout.java:1434) at android.view.View.layout(View.java:14471) at android.view.ViewGroup.layout(ViewGroup.java:4562) at android.widget.FrameLayout.onLayout(FrameLayout.java:448) at android.view.View.layout(View.java:14471) at android.view.ViewGroup.layout(ViewGroup.java:4562) at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:1984) at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1738) at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1008) at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5509) at android.view.Choreographer$CallbackRecord.run(Choreographer.java:749) at android.view.Choreographer.doCallbacks(Choreographer.java:562) at android.view.Choreographer.doFrame(Choreographer.java:532) at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:735) at android.os.Handler.handleCallback(Handler.java:730) at android.os.Handler.dispatchMessage(Handler.java:92) at android.os.Looper.loop(Looper.java:137) at android.app.Acti