Error

E/AndroidRuntime: FATAL EXCEPTION: main Process: com.example.socialmedia, PID: 28982 java.lang.IndexOutOfBoundsException: Inconsistency detected. Invalid view holder adapter positionPostViewHolder{9c5e934 position=4 id=-1, oldPos=0, pLpos:0 scrap [attachedScrap] tmpDetached no parent} androidx.recyclerview.widget.RecyclerView{b6a615e VFED..... ......I. 0,0-1012,1736 #7f080194 app:id/postsRv}, adapter:com.example.socialmedia.adapter.PostAdapter@6327473, layout:androidx.recyclerview.widget.LinearLayoutManager@6e8cf30, context:com.example.socialmedia.MainActivity@8802acd at androidx.recyclerview.widget.RecyclerView$Recycler.validateViewHolderForOffsetPosition(RecyclerView.java:6156) at androidx.recyclerview.widget.RecyclerView$Recycler.tryGetViewHolderForPositionByDeadline(RecyclerView.java:6339) at androidx.recyclerview.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:6300) at androidx.recyclerview.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:6296) at androidx.recyclerview.widget.LinearLayoutManager$LayoutState.next(LinearLayoutManager.java:2330) at androidx.recyclerview.widget.LinearLayoutManager.layoutChunk(LinearLayoutManager.java:1631) at androidx.recyclerview.widget.LinearLayoutManager.fill(LinearLayoutManager.java:1591) at androidx.recyclerview.widget.LinearLayoutManager.onLayoutChildren(LinearLayoutManager.java:668) at androidx.recyclerview.widget.RecyclerView.dispatchLayoutStep1(RecyclerView.java:4255) at androidx.recyclerview.widget.RecyclerView.dispatchLayout(RecyclerView.java:4010) at androidx.recyclerview.widget.RecyclerView.onLayout(RecyclerView.java:4578) at android.view.View.layout(View.java:24461) at android.view.ViewGroup.layout(ViewGroup.java:7412) at androidx.swiperefreshlayout.widget.SwipeRefreshLayout.onLayout(SwipeRefreshLayout.java:689) at android.view.View.layout(View.java:24461) at android.view.ViewGroup.layout(ViewGroup.java:7412) at androidx.constraintlayout.widget.ConstraintLayout.onLayout(ConstraintLayout.java:1873) at android.view.View.layout(View.java:24461) at android.view.ViewGroup.layout(ViewGroup.java:7412) at android.widget.FrameLayout.layoutChildren(FrameLayout.java:374) at android.widget.FrameLayout.onLayout(FrameLayout.java:312) at android.view.View.layout(View.java:24461) at android.view.ViewGroup.layout(ViewGroup.java:7412) at android.widget.FrameLayout.layoutChildren(FrameLayout.java:374) at android.widget.FrameLayout.onLayout(FrameLayout.java:312) at android.view.View.layout(View.java:24461) at android.view.ViewGroup.layout(ViewGroup.java:7412) at android.widget.RelativeLayout.onLayout(RelativeLayout.java:1103) at android.view.View.layout(View.java:24461) at android.view.ViewGroup.layout(ViewGroup.java:7412) at android.widget.FrameLayout.layoutChildren(FrameLayout.java:374) at android.widget.FrameLayout.onLayout(FrameLayout.java:312) at android.view.View.layout(View.java:24461) at android.view.ViewGroup.layout(ViewGroup.java:7412) at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1829) at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1673) at android.widget.LinearLayout.onLayout(LinearLayout.java:1582) at android.view.View.layout(View.java:24461) at android.view.ViewGroup.layout(ViewGroup.java:7412) at android.widget.FrameLayout.layoutChildren(FrameLayout.java:374) at android.widget.FrameLayout.onLayout(FrameLayout.java:312) at android.view.View.layout(View.java:24461) at android.view.ViewGroup.layout(ViewGroup.java:7412) at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1829) at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1673) at android.widget.LinearLayout.onLayout(LinearLayout.java:1582) at android.view.View.layout(View.java:24461) at android.view.ViewGroup.layout(ViewGroup.java:7412) at android.widget.FrameLayout.layoutChildren(FrameLayout.java:374) at android.widget.FrameLayout.onLayout(FrameLayout.java:312) E/AndroidRuntime: at com.android.internal.policy.DecorView.onLayout(DecorView.java:1331) at android.view.View.layout(View.java:24461) at android.view.ViewGroup.layout(ViewGroup.java:7412) at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:4614) at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:4036) at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:2924) at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:10513) at android.view.Choreographer$CallbackRecord.run(Choreographer.java:1108) at android.view.Choreographer.doCallbacks(Choreographer.java:866) at android.view.Choreographer.doFrame(Choreographer.java:797) at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:1092) at android.os.Handler.handleCallback(Handler.java:938) at android.os.Handler.dispatchMessage(Handler.java:99) at android.os.Looper.loopOnce(Looper.java:226) at android.os.Looper.loop(Looper.java:313) at android.app.ActivityThread.main(ActivityThread.java:8751) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:571) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1135) 

 private fun getRecipientId(postId: String, callback: (recipientId: String) -> Unit){ val postRef = FirebaseFirestore.getInstance().collection("posts").document(postId) postRef.get().addOnSuccessListener { documentSnapshot -> val post = documentSnapshot.toObject(Post::class.java) if (post != null) { val recipientId = post.createdBy.uid callback(recipientId) } } } getRecipientId(postId){ recipientId = it }