java.lang.IndexOutOfBoundsException: Index: 0, Size: 0
	java.util.ArrayList.RangeCheck(ArrayList.java:546)
	java.util.ArrayList.remove(ArrayList.java:389)
	javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:271)
	javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:381)
	com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:75)
	com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:200)
	com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:90)
	javax.faces.webapp.FacesServlet.service(FacesServlet.java:197)