FULL PRODUCT VERSION :
java version "1.8.0_20"
Java(TM) SE Runtime Environment (build 1.8.0_20-b26)
Java HotSpot(TM) Client VM (build 25.20-b23, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows [Version 6.1.7601]

A DESCRIPTION OF THE PROBLEM :
AutoMove of a node bound to a BorderPositionProperty to somewhere else in the scene graph leads to RuntimeException "A bound value cannot be set"

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1. Bind a centerProperty (or any other BorderPositionProperty) of a BorderPane to a Property with a node
2. Add the node somewhere else in the scene graph

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
No runtime exception, the node is moved from the BorderPane to its new place in the scene graph
ACTUAL -
A runtime exception as seen in the crash log

ERROR MESSAGES/STACK TRACES THAT OCCUR :
Exception in thread "JavaFX Application Thread" java.lang.RuntimeException: A bound value cannot be set.
at javafx.beans.property.ObjectPropertyBase.set(ObjectPropertyBase.java:141)
at javafx.scene.layout.BorderPane$BorderPositionProperty$1.onChanged(BorderPane.java:657)
at com.sun.javafx.collections.ListListenerHelper$Generic.fireValueChangedEvent(ListListenerHelper.java:329)
at com.sun.javafx.collections.ListListenerHelper.fireValueChangedEvent(ListListenerHelper.java:73)
at com.sun.javafx.collections.VetoableListDecorator.lambda$new$22(VetoableListDecorator.java:76)
at com.sun.javafx.collections.VetoableListDecorator$$Lambda$58/2440711.onChanged(Unknown Source)
at com.sun.javafx.collections.ListListenerHelper$Generic.fireValueChangedEvent(ListListenerHelper.java:329)
at com.sun.javafx.collections.ListListenerHelper.fireValueChangedEvent(ListListenerHelper.java:73)
at javafx.collections.ObservableListBase.fireChange(ObservableListBase.java:233)
at javafx.collections.ListChangeBuilder.commit(ListChangeBuilder.java:482)
at javafx.collections.ListChangeBuilder.endChange(ListChangeBuilder.java:541)
at javafx.collections.ObservableListBase.endChange(ObservableListBase.java:205)
at javafx.collections.ModifiableObservableListBase.remove(ModifiableObservableListBase.java:183)
at com.sun.javafx.collections.VetoableListDecorator.remove(VetoableListDecorator.java:332)
at com.sun.javafx.collections.VetoableListDecorator.remove(VetoableListDecorator.java:221)
at javafx.scene.Parent$1.onChanged(Parent.java:248)
at com.sun.javafx.collections.TrackableObservableList.lambda$new$20(TrackableObservableList.java:45)
at com.sun.javafx.collections.TrackableObservableList$$Lambda$53/9144295.onChanged(Unknown Source)
at com.sun.javafx.collections.ListListenerHelper$Generic.fireValueChangedEvent(ListListenerHelper.java:329)
at com.sun.javafx.collections.ListListenerHelper.fireValueChangedEvent(ListListenerHelper.java:73)
at javafx.collections.ObservableListBase.fireChange(ObservableListBase.java:233)
at javafx.collections.ListChangeBuilder.commit(ListChangeBuilder.java:482)
at javafx.collections.ListChangeBuilder.endChange(ListChangeBuilder.java:541)
at javafx.collections.ObservableListBase.endChange(ObservableListBase.java:205)
at javafx.collections.ModifiableObservableListBase.add(ModifiableObservableListBase.java:155)
at java.util.AbstractList.add(AbstractList.java:108)
at com.sun.javafx.collections.VetoableListDecorator.add(VetoableListDecorator.java:209)
at javafx.scene.layout.BorderPane$BorderPositionProperty.invalidated(BorderPane.java:680)
at javafx.beans.property.ObjectPropertyBase.markInvalid(ObjectPropertyBase.java:111)
at javafx.beans.property.ObjectPropertyBase.set(ObjectPropertyBase.java:145)
at javafx.scene.layout.BorderPane.setCenter(BorderPane.java:260)
at BorderPaneCenterBindingBug.start(BorderPaneCenterBindingBug.java:31)
at com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$153(LauncherImpl.java:821)
at com.sun.javafx.application.LauncherImpl$$Lambda$50/574481.run(Unknown Source)
at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$166(PlatformImpl.java:323)
at com.sun.javafx.application.PlatformImpl$$Lambda$46/23110676.run(Unknown Source)
at com.sun.javafx.application.PlatformImpl.lambda$null$164(PlatformImpl.java:292)
at com.sun.javafx.application.PlatformImpl$$Lambda$48/32741295.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.application.PlatformImpl.lambda$runLater$165(PlatformImpl.java:291)
at com.sun.javafx.application.PlatformImpl$$Lambda$47/8040861.run(Unknown Source)
at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.lambda$null$141(WinApplication.java:102)
at com.sun.glass.ui.win.WinApplication$$Lambda$38/188653.run(Unknown Source)
at java.lang.Thread.run(Thread.java:745)


REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import javafx.application.Application;
import javafx.beans.property.SimpleObjectProperty;
import javafx.scene.Node;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.BorderPane;
import javafx.stage.Stage;

public class BorderPaneCenterBindingBug extends Application {

    public static void main(String[] args) {
        launch(args);
    }

    @Override
    public void start(Stage primaryStage) {
        BorderPane borderPane1 = new BorderPane();
        BorderPane borderPane2 = new BorderPane();
        BorderPane rootPane = new BorderPane();
        rootPane.setLeft(borderPane1);
        rootPane.setRight(borderPane2);

        Button contentToMove = new Button("x");
        borderPane1.centerProperty().bind(new SimpleObjectProperty<Node>(contentToMove));

        primaryStage.setScene(new Scene(rootPane));
        primaryStage.show();

        borderPane2.setCenter(contentToMove);
    }
}

---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
Workaround is not to bind to centerProperty, topProperty, bottomProperty, leftProperty and rightProperty of BorderPane.

The fix would be to add this line before the set(null) in line 657 of BorderPane:

unbind();