diff --git a/designer_base/src/com/fr/design/mainframe/UndoStateEdit.java b/designer_base/src/com/fr/design/mainframe/UndoStateEdit.java
index f81e2bbd3a..3fc8f0436f 100644
--- a/designer_base/src/com/fr/design/mainframe/UndoStateEdit.java
+++ b/designer_base/src/com/fr/design/mainframe/UndoStateEdit.java
@@ -50,7 +50,6 @@ public class UndoStateEdit extends AbstractUndoableEdit {
             }
         }
         if (this.old != null) {
-            HelpDialogManager.getInstance().destroyDialog();
             this.old.applyState();
         }
         if (BaseUtils.isAuthorityEditing()) {