diff --git a/Service/Execute/SwappingStateMachine.cs b/Service/Execute/SwappingStateMachine.cs
index 12b6a7d..578db01 100644
--- a/Service/Execute/SwappingStateMachine.cs
+++ b/Service/Execute/SwappingStateMachine.cs
@@ -333,7 +333,8 @@ public class SwappingStateMachine : IDisposable
         Array values = Enum.GetValues(typeof(InfoEnum.BusinessSwappingStep));
         foreach (var value in values)
         {
-            StepModel[(string)value] = new StepModel()
+          
+            StepModel[value.ToString()] = new StepModel()
                 {
                     StepNo = (int)value,
                     Status = 0,