diff --git a/src/main/java/org/gcube/portlets/user/td/widgetcommonevent/shared/GridHeaderColumnMenuItemOperationId.java b/src/main/java/org/gcube/portlets/user/td/widgetcommonevent/shared/GridHeaderColumnMenuItemOperationId.java
index 311191a..03f7d5e 100644
--- a/src/main/java/org/gcube/portlets/user/td/widgetcommonevent/shared/GridHeaderColumnMenuItemOperationId.java
+++ b/src/main/java/org/gcube/portlets/user/td/widgetcommonevent/shared/GridHeaderColumnMenuItemOperationId.java
@@ -15,7 +15,8 @@ public enum GridHeaderColumnMenuItemOperationId {
 		ChangeToType("2000"), 
 		ModifyColumnValueOnCondition("3001"), 
 		NewAnnotationColumn("3002"),
-		Filter("3003");
+		Filter("3003"),
+		ColumnDuplicateValidation("5004");
 		
 		/**
 		 * Create OperationId