Index: standard/project/web/src/main/java/egovframework/api/rivalWar/menu/controller/AdminMenuController.java
===================================================================
diff -u -r719cc312c906a7f758f977c425a7983e27d7a746 -r4c3352ce783517fd14f80d01204c6f1486c723fd
--- standard/project/web/src/main/java/egovframework/api/rivalWar/menu/controller/AdminMenuController.java	(.../AdminMenuController.java)	(revision 719cc312c906a7f758f977c425a7983e27d7a746)
+++ standard/project/web/src/main/java/egovframework/api/rivalWar/menu/controller/AdminMenuController.java	(.../AdminMenuController.java)	(revision 4c3352ce783517fd14f80d01204c6f1486c723fd)
@@ -24,6 +24,7 @@
 
 import javax.servlet.http.HttpServletRequest;
 import java.util.HashSet;
+import java.util.Set;
 
 @Controller
 @RequestMapping(value = {"/api/rivalWar/ROLE_ADMIN/menu"})
@@ -110,19 +111,12 @@
 
         if(targetMenuNode.getDirectChatDTOs().size() > 0){
 
-            final HashSet<DirectChatDTO> dummyChatDTOs = new HashSet<DirectChatDTO>();
-            targetMenuNode.setDirectChatDTOs(dummyChatDTOs);
-            menuService.alterNode(targetMenuNode);
-
-            HashSet<DirectChatDTO> targetChatDTOs = (HashSet<DirectChatDTO>) targetMenuNode.getDirectChatDTOs();
+            Set<DirectChatDTO> targetChatDTOs = targetMenuNode.getDirectChatDTOs();
             for (DirectChatDTO loopChatDTO :targetChatDTOs) {
                 directChatService.removeNode(loopChatDTO);
             }
         }
 
-
-
-
         jsTreeHibernateDTO.setStatus(menuService.removeNode(targetMenuNode));
 
         setJsonDefaultSetting(jsTreeHibernateDTO);
Index: standard/project/web/src/main/java/egovframework/api/rivalWar/menu/vo/MenuDTO.java
===================================================================
diff -u -r6002d2a87002bdc63bed63cadcca70734e7158dd -r4c3352ce783517fd14f80d01204c6f1486c723fd
--- standard/project/web/src/main/java/egovframework/api/rivalWar/menu/vo/MenuDTO.java	(.../MenuDTO.java)	(revision 6002d2a87002bdc63bed63cadcca70734e7158dd)
+++ standard/project/web/src/main/java/egovframework/api/rivalWar/menu/vo/MenuDTO.java	(.../MenuDTO.java)	(revision 4c3352ce783517fd14f80d01204c6f1486c723fd)
@@ -152,7 +152,7 @@
 
 	@LazyCollection(LazyCollectionOption.FALSE)
 	@JsonManagedReference
-	@OneToMany(cascade = CascadeType.ALL)
+	@OneToMany(fetch=FetchType.LAZY, orphanRemoval=false, cascade=CascadeType.PERSIST)
 	@JoinTable(
 			name = "T_M_MENU_DIRECTCHAT",
 			joinColumns = @JoinColumn(name = "MENU_CID"),