diff --git a/framework/src/Volo.Abp.Core/Volo/Abp/SimpleStateChecking/SimpleStateCheckerSerializerExtensions.cs b/framework/src/Volo.Abp.Core/Volo/Abp/SimpleStateChecking/SimpleStateCheckerSerializerExtensions.cs
index 1e4d272379..3594261741 100644
--- a/framework/src/Volo.Abp.Core/Volo/Abp/SimpleStateChecking/SimpleStateCheckerSerializerExtensions.cs
+++ b/framework/src/Volo.Abp.Core/Volo/Abp/SimpleStateChecking/SimpleStateCheckerSerializerExtensions.cs
@@ -82,7 +82,7 @@ public static class SimpleStateCheckerSerializerExtensions
                 throw new AbpException("JSON value is not an array of objects: " + value);
             }
 
-            checkers[i] = serializer.Deserialize(jsonObject, state);
+            checkers.Add(serializer.Deserialize(jsonObject, state));
         }
 
         return checkers.Where(x => x != null).ToArray();