Error removing function after changing field

• Add built-in function with arguments to a mapping from a non-indexed source to an indexed target
• Change the source field in the mapping to a field in a collection (thus, making the mapping unindexed)
• Remove the function

The following error results:

java.lang.RuntimeException: Invalid index size for model, expected 3 but index size is 1
at org.jboss.tools.fuse.transformation.dozer.DozerMapperConfiguration.validateIndex(DozerMapperConfiguration.java:560)
at org.jboss.tools.fuse.transformation.dozer.DozerMapperConfiguration.mapField(DozerMapperConfiguration.java:245)
at org.jboss.tools.fuse.transformation.dozer.DozerMapperConfiguration.mapField(DozerMapperConfiguration.java:39)
at org.jboss.tools.fuse.transformation.editor.internal.util.TransformationConfig.uncustomizeMapping(TransformationConfig.java:551)
at org.jboss.tools.fuse.transformation.editor.internal.MappingDetailViewer.removeFunction(MappingDetailViewer.java:531)
at org.jboss.tools.fuse.transformation.editor.internal.MappingDetailViewer.access$2(MappingDetailViewer.java:530)
at org.jboss.tools.fuse.transformation.editor.internal.MappingDetailViewer$FunctionControl$3.widgetSelected(MappingDetailViewer.java:761)
at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:248)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4199)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1467)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1490)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1475)
at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:1279)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4042)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3669)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1151)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1032)
at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:148)
at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:636)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:579)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:150)
at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:135)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:380)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:235)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:648)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:603)
at org.eclipse.equinox.launcher.Main.run(Main.java:1465)
at org.eclipse.equinox.launcher.Main.main(Main.java:1438)