diff --git a/src/Infrastructure/BotSharp.Abstraction/Infrastructures/Enums/StateConst.cs b/src/Infrastructure/BotSharp.Abstraction/Infrastructures/Enums/StateConst.cs
index 4b1af0e2..038699ac 100644
--- a/src/Infrastructure/BotSharp.Abstraction/Infrastructures/Enums/StateConst.cs
+++ b/src/Infrastructure/BotSharp.Abstraction/Infrastructures/Enums/StateConst.cs
@@ -17,5 +17,4 @@ public class StateConst
     public const string SUB_CONVERSATION_ID = "sub_conversation_id";
     public const string ORIGIN_CONVERSATION_ID = "origin_conversation_id";
     public const string WEB_DRIVER_TASK_ID = "web_driver_task_id";
-    public const string PHONE_CALL_SUCCESSED = "phone_call_successed";
 }
diff --git a/src/Plugins/BotSharp.Plugin.Twilio/OutboundPhoneCallHandler/Functions/OutboundPhoneCallFn.cs b/src/Plugins/BotSharp.Plugin.Twilio/OutboundPhoneCallHandler/Functions/OutboundPhoneCallFn.cs
index ae2661a5..88586ea8 100644
--- a/src/Plugins/BotSharp.Plugin.Twilio/OutboundPhoneCallHandler/Functions/OutboundPhoneCallFn.cs
+++ b/src/Plugins/BotSharp.Plugin.Twilio/OutboundPhoneCallHandler/Functions/OutboundPhoneCallFn.cs
@@ -123,7 +123,6 @@ public class OutboundPhoneCallFn : IFunctionCallback
             var originConversationId = convService.ConversationId;
             var entryAgentId = routing.EntryAgentId;
 
-            states.SetState(StateConst.PHONE_CALL_SUCCESSED, true);
             await ForkConversation(args, entryAgentId, originConversationId, newConversationId, call);
 
             message.Content = $"The call has been successfully queued. The initial information is as follows: {args.InitialMessage}.";
@@ -131,7 +130,6 @@ public class OutboundPhoneCallFn : IFunctionCallback
         }
         else
         {
-            states.SetState(StateConst.PHONE_CALL_SUCCESSED, false);
             message.Content = $"Failed to make a call, status is {call.Status}.";
             return false;
         }