Error is thrown when Weld Scan object is created again

org.jboss.tools.common.model.XModelException: Cdi beans beans.xml already contains Scan.
	at org.jboss.tools.common.meta.action.impl.handlers.DefaultCreateHandler.addCreatedObject(DefaultCreateHandler.java:179)
	at org.jboss.tools.common.meta.action.impl.handlers.DefaultCreateHandler.addCreatedObject(DefaultCreateHandler.java:169)
	at org.jboss.tools.common.meta.action.impl.handlers.DefaultCreateHandler.addCreatedObject(DefaultCreateHandler.java:143)
	at org.jboss.tools.common.meta.action.impl.handlers.DefaultCreateHandler.executeHandler(DefaultCreateHandler.java:49)
	at org.jboss.tools.common.meta.action.impl.XActionImpl.executeHandler(XActionImpl.java:65)
	at org.jboss.tools.common.model.ui.action.XModelObjectAction.actionPerformed(XModelObjectAction.java:96)
	at org.jboss.tools.common.model.ui.action.XModelObjectAction$AL.widgetSelected(XModelObjectAction.java:131)
	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.Widget.sendEvent(Widget.java:1392)
	at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3705)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3326)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1049)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:939)
	at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:79)
	at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:587)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:542)
	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:124)
	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:353)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:180)
	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:629)
	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:584)
	at org.eclipse.equinox.launcher.Main.run(Main.java:1443)
	at org.eclipse.equinox.launcher.Main.main(Main.java:1419)