diff --git a/framework/src/Volo.Abp.Mapperly/Volo/Abp/Mapperly/MapperlyAutoObjectMappingProvider.cs b/framework/src/Volo.Abp.Mapperly/Volo/Abp/Mapperly/MapperlyAutoObjectMappingProvider.cs
index c2b830b22f..f6a0de2d30 100644
--- a/framework/src/Volo.Abp.Mapperly/Volo/Abp/Mapperly/MapperlyAutoObjectMappingProvider.cs
+++ b/framework/src/Volo.Abp.Mapperly/Volo/Abp/Mapperly/MapperlyAutoObjectMappingProvider.cs
@@ -245,31 +245,15 @@ public class MapperlyAutoObjectMappingProvider : IAutoObjectMappingProvider
         {
             return;
         }
-
-        if (sourceHasExtraProperties.ExtraProperties ==
-            destinationHasExtraProperties.ExtraProperties)
-        {
-            try
-            {
-                ObjectHelper.TrySetProperty(destinationHasExtraProperties, x => x.ExtraProperties, () => new ExtraPropertyDictionary(sourceHasExtraProperties.ExtraProperties));
-            }
-            catch
-            {
-                // Has no setter, ignore it.
-            }
-        }
         
-        if (mapExtraPropertiesAttribute != null)
-        {
-            MapExtraProperties<TSource, TDestination>(
-                sourceHasExtraProperties,
-                destinationHasExtraProperties,
-                destinationExtraProperty,
-                mapExtraPropertiesAttribute.DefinitionChecks,
-                mapExtraPropertiesAttribute.IgnoredProperties,
-                mapExtraPropertiesAttribute.MapToRegularProperties
-            );
-        }
+        MapExtraProperties<TSource, TDestination>(
+            sourceHasExtraProperties,
+            destinationHasExtraProperties,
+            destinationExtraProperty,
+            mapExtraPropertiesAttribute?.DefinitionChecks ?? MappingPropertyDefinitionChecks.Null,
+            mapExtraPropertiesAttribute?.IgnoredProperties,
+            mapExtraPropertiesAttribute?.MapToRegularProperties ?? false
+        );
     }
     protected virtual void MapExtraProperties<TSource, TDestination>(
         IHasExtraProperties source,
diff --git a/framework/test/Volo.Abp.Mapperly.Tests/Volo/Abp/Mapperly/ExtraProperties_Dictionary_Reference_Tests.cs b/framework/test/Volo.Abp.Mapperly.Tests/Volo/Abp/Mapperly/ExtraProperties_Dictionary_Reference_Tests.cs
index 512f98f909..19bc24904e 100644
--- a/framework/test/Volo.Abp.Mapperly.Tests/Volo/Abp/Mapperly/ExtraProperties_Dictionary_Reference_Tests.cs
+++ b/framework/test/Volo.Abp.Mapperly.Tests/Volo/Abp/Mapperly/ExtraProperties_Dictionary_Reference_Tests.cs
@@ -84,7 +84,6 @@ public class ExtraProperties_Dictionary_Reference_Tests : AbpIntegratedTest<Mapp
         destination.SetProperty("DestinationProperty", "DestinationValue");
 
         var originalSourceReference = source.ExtraProperties;
-        var originalDestinationReference = destination.ExtraProperties;
 
         // Verify they have different references before mapping
         ReferenceEquals(source.ExtraProperties, destination.ExtraProperties).ShouldBeFalse();
diff --git a/framework/test/Volo.Abp.Mapperly.Tests/Volo/Abp/Mapperly/SampleClasses/MapperlyMappers.cs b/framework/test/Volo.Abp.Mapperly.Tests/Volo/Abp/Mapperly/SampleClasses/MapperlyMappers.cs
index 66ec4c2867..eb11d16be1 100644
--- a/framework/test/Volo.Abp.Mapperly.Tests/Volo/Abp/Mapperly/SampleClasses/MapperlyMappers.cs
+++ b/framework/test/Volo.Abp.Mapperly.Tests/Volo/Abp/Mapperly/SampleClasses/MapperlyMappers.cs
@@ -69,7 +69,6 @@ public class TestEntityWithReadonlyExtraProperties : IHasExtraProperties
 }
 
 [Mapper]
-[MapExtraProperties]
 public partial class TestEntityWithExtraPropertiesMapper : MapperBase<TestEntityWithExtraProperties, TestEntityDtoWithExtraProperties>
 {
     public override partial TestEntityDtoWithExtraProperties Map(TestEntityWithExtraProperties source);
@@ -78,7 +77,6 @@ public partial class TestEntityWithExtraPropertiesMapper : MapperBase<TestEntity
 }
 
 [Mapper]
-[MapExtraProperties]
 public partial class TestEntityWithReadonlyExtraPropertiesMapper : MapperBase<TestEntityWithReadonlyExtraProperties, TestEntityWithReadonlyExtraProperties>
 {
     public override partial TestEntityWithReadonlyExtraProperties Map(TestEntityWithReadonlyExtraProperties source);