diff --git a/Assets/Scripts/Streamingle/StreamingleControl/Editor/AvatarOutfitControllerEditor.cs b/Assets/Scripts/Streamingle/StreamingleControl/Editor/AvatarOutfitControllerEditor.cs
index 1a695dea2..11007ead1 100644
--- a/Assets/Scripts/Streamingle/StreamingleControl/Editor/AvatarOutfitControllerEditor.cs
+++ b/Assets/Scripts/Streamingle/StreamingleControl/Editor/AvatarOutfitControllerEditor.cs
@@ -91,6 +91,8 @@ public class AvatarOutfitControllerEditor : Editor
         {
             avatarsContainer.Add(CreateAvatarElement(i));
         }
+
+        avatarsContainer.Bind(serializedObject);
     }
 
     private VisualElement CreateAvatarElement(int avatarIndex)
@@ -264,16 +266,11 @@ public class AvatarOutfitControllerEditor : Editor
 
     private void DeleteAvatar(int index)
     {
-        var avatar = controller.avatars[index];
-        if (EditorUtility.DisplayDialog("아바타 삭제",
-            $"아바타 '{avatar.avatarName}'을(를) 삭제하시겠습니까?", "삭제", "취소"))
-        {
-            Undo.RecordObject(target, "Delete Avatar");
-            controller.avatars.RemoveAt(index);
-            EditorUtility.SetDirty(target);
-            serializedObject.Update();
-            RebuildAvatarList();
-        }
+        Undo.RecordObject(target, "Delete Avatar");
+        controller.avatars.RemoveAt(index);
+        EditorUtility.SetDirty(target);
+        serializedObject.Update();
+        RebuildAvatarList();
     }
 
     private void SwapAvatars(int a, int b)
@@ -301,18 +298,13 @@ public class AvatarOutfitControllerEditor : Editor
 
     private void DeleteOutfit(int avatarIndex, int outfitIndex)
     {
-        var outfit = controller.avatars[avatarIndex].outfits[outfitIndex];
-        if (EditorUtility.DisplayDialog("의상 삭제",
-            $"의상 '{outfit.outfitName}'을(를) 삭제하시겠습니까?", "삭제", "취소"))
-        {
-            Undo.RecordObject(target, "Delete Outfit");
-            var outfits = new List<AvatarOutfitController.OutfitData>(controller.avatars[avatarIndex].outfits);
-            outfits.RemoveAt(outfitIndex);
-            controller.avatars[avatarIndex].outfits = outfits.ToArray();
-            EditorUtility.SetDirty(target);
-            serializedObject.Update();
-            RebuildAvatarList();
-        }
+        Undo.RecordObject(target, "Delete Outfit");
+        var outfits = new List<AvatarOutfitController.OutfitData>(controller.avatars[avatarIndex].outfits);
+        outfits.RemoveAt(outfitIndex);
+        controller.avatars[avatarIndex].outfits = outfits.ToArray();
+        EditorUtility.SetDirty(target);
+        serializedObject.Update();
+        RebuildAvatarList();
     }
 
     #endregion
diff --git a/Assets/Scripts/Streamingle/StreamingleControl/Editor/CameraManagerEditor.cs b/Assets/Scripts/Streamingle/StreamingleControl/Editor/CameraManagerEditor.cs
index 0fc5314d0..102ca6594 100644
--- a/Assets/Scripts/Streamingle/StreamingleControl/Editor/CameraManagerEditor.cs
+++ b/Assets/Scripts/Streamingle/StreamingleControl/Editor/CameraManagerEditor.cs
@@ -319,15 +319,10 @@ public class CameraManagerEditor : Editor
 
     private void DeletePreset(int index)
     {
-        var preset = manager.cameraPresets[index];
-        if (EditorUtility.DisplayDialog("프리셋 삭제",
-            $"프리셋 '{preset.presetName}'을(를) 삭제하시겠습니까?", "삭제", "취소"))
-        {
-            Undo.RecordObject(target, "Delete Camera Preset");
-            manager.cameraPresets.RemoveAt(index);
-            EditorUtility.SetDirty(target);
-            RebuildPresetList();
-        }
+        Undo.RecordObject(target, "Delete Camera Preset");
+        manager.cameraPresets.RemoveAt(index);
+        EditorUtility.SetDirty(target);
+        RebuildPresetList();
     }
 
     private void SwapPresets(int a, int b)
diff --git a/Assets/Scripts/Streamingle/StreamingleControl/Editor/EventControllerEditor.cs b/Assets/Scripts/Streamingle/StreamingleControl/Editor/EventControllerEditor.cs
index 56336e57e..e66c5a53a 100644
--- a/Assets/Scripts/Streamingle/StreamingleControl/Editor/EventControllerEditor.cs
+++ b/Assets/Scripts/Streamingle/StreamingleControl/Editor/EventControllerEditor.cs
@@ -85,6 +85,8 @@ public class EventControllerEditor : Editor
         {
             eventsContainer.Add(CreateEventGroupElement(i));
         }
+
+        eventsContainer.Bind(serializedObject);
     }
 
     private VisualElement CreateEventGroupElement(int index)
@@ -156,16 +158,11 @@ public class EventControllerEditor : Editor
 
     private void DeleteEvent(int index)
     {
-        var group = controller.eventGroups[index];
-        if (EditorUtility.DisplayDialog("이벤트 삭제",
-            $"이벤트 '{group.groupName}'을(를) 삭제하시겠습니까?", "삭제", "취소"))
-        {
-            Undo.RecordObject(target, "Delete Event Group");
-            controller.eventGroups.RemoveAt(index);
-            EditorUtility.SetDirty(target);
-            serializedObject.Update();
-            RebuildEventList();
-        }
+        Undo.RecordObject(target, "Delete Event Group");
+        controller.eventGroups.RemoveAt(index);
+        EditorUtility.SetDirty(target);
+        serializedObject.Update();
+        RebuildEventList();
     }
 
     private void SwapEvents(int a, int b)
diff --git a/Assets/Scripts/Streamingle/StreamingleControl/Editor/ItemControllerEditor.cs b/Assets/Scripts/Streamingle/StreamingleControl/Editor/ItemControllerEditor.cs
index 8eb24ee3e..b7016f92f 100644
--- a/Assets/Scripts/Streamingle/StreamingleControl/Editor/ItemControllerEditor.cs
+++ b/Assets/Scripts/Streamingle/StreamingleControl/Editor/ItemControllerEditor.cs
@@ -87,6 +87,8 @@ public class ItemControllerEditor : Editor
         {
             itemsContainer.Add(CreateItemGroupElement(i));
         }
+
+        itemsContainer.Bind(serializedObject);
     }
 
     private VisualElement CreateItemGroupElement(int index)
@@ -167,16 +169,11 @@ public class ItemControllerEditor : Editor
 
     private void DeleteItem(int index)
     {
-        var group = controller.itemGroups[index];
-        if (EditorUtility.DisplayDialog("그룹 삭제",
-            $"그룹 '{group.groupName}'을(를) 삭제하시겠습니까?", "삭제", "취소"))
-        {
-            Undo.RecordObject(target, "Delete Item Group");
-            controller.itemGroups.RemoveAt(index);
-            EditorUtility.SetDirty(target);
-            serializedObject.Update();
-            RebuildItemList();
-        }
+        Undo.RecordObject(target, "Delete Item Group");
+        controller.itemGroups.RemoveAt(index);
+        EditorUtility.SetDirty(target);
+        serializedObject.Update();
+        RebuildItemList();
     }
 
     private void SwapItems(int a, int b)