diff --git a/AirBomber/AirBomber/WarAirplaneGenericStorage.cs b/AirBomber/AirBomber/WarAirplaneGenericStorage.cs
index c3c21eb..12c660c 100644
--- a/AirBomber/AirBomber/WarAirplaneGenericStorage.cs
+++ b/AirBomber/AirBomber/WarAirplaneGenericStorage.cs
@@ -23,6 +23,10 @@ namespace AirBomber.Generics
         }
         public void AddSet(string name)
         {
+            if (_warAirplaneStorages.ContainsKey(name))
+            {
+                return;
+            }
             _warAirplaneStorages.Add(name, new WarAirplaneGenericCollection<DrawingWarAirplane, DrawingObjectWarAirplane>(_pictureWidth, _pictureHeight));
         }
         public void DelSet(string name)