diff --git a/ganttzk/src/main/resources/web/js/ganttz/GanttPanel.js b/ganttzk/src/main/resources/web/js/ganttz/GanttPanel.js
index 95061973a..bfa317d55 100644
--- a/ganttzk/src/main/resources/web/js/ganttz/GanttPanel.js
+++ b/ganttzk/src/main/resources/web/js/ganttz/GanttPanel.js
@@ -7,11 +7,7 @@ ganttz.GanttPanel = zk.$extends(zk.Widget,{
     },
     $init : function(){
         this.$super('$init');
-        if (!this.$class.getInstance()){
-            this.$class.setInstance(this);
-        }
-        else
-            throw "There's already one GanttPanel";
+        this.$class.setInstance(this);
     },
     bind_ : function(evt){
         this.$supers('bind_', arguments);