diff --git a/Service/Execute/SwappingStateMachine.cs b/Service/Execute/SwappingStateMachine.cs
index 578db01..efcdfb3 100644
--- a/Service/Execute/SwappingStateMachine.cs
+++ b/Service/Execute/SwappingStateMachine.cs
@@ -329,12 +329,15 @@ public class SwappingStateMachine : IDisposable
 
         SwapOrderBatteryInfo = null;
         StepSort = 0;
-        
+        StepModel =
+            new ConcurrentDictionary<string, StepModel>
+                ();
         Array values = Enum.GetValues(typeof(InfoEnum.BusinessSwappingStep));
         foreach (var value in values)
         {
-          
-            StepModel[value.ToString()] = new StepModel()
+         
+            
+            StepModel[value.ToInt()+""] = new StepModel()
                 {
                     StepNo = (int)value,
                     Status = 0,