diff --git a/BBWY.Server.Business/PlatformSDK/APIExecutionTimesRecorder.cs b/BBWY.Server.Business/PlatformSDK/APIExecutionTimesRecorder.cs
index ad04f90e..bb3df73d 100644
--- a/BBWY.Server.Business/PlatformSDK/APIExecutionTimesRecorder.cs
+++ b/BBWY.Server.Business/PlatformSDK/APIExecutionTimesRecorder.cs
@@ -28,7 +28,7 @@ namespace BBWY.Server.Business
 
         public void Flush()
         {
-            var currentRoundList = apiDictionary.Select(kv => new { Api = kv.Key, Count = kv.Value });
+            var currentRoundList = apiDictionary.Select(kv => new { Api = kv.Key, Count = kv.Value }).ToList();
             apiDictionary.Clear();
             var currentRoundKeyList = currentRoundList.Select(x => x.Api).ToList();
             var today = DateTime.Now.Date;