diff --git a/modules/cms-kit/src/Volo.CmsKit.Domain.Shared/Volo/CmsKit/CmsKitErrorCodes.cs b/modules/cms-kit/src/Volo.CmsKit.Domain.Shared/Volo/CmsKit/CmsKitErrorCodes.cs
index 336d163cfe..76ba39c3f2 100644
--- a/modules/cms-kit/src/Volo.CmsKit.Domain.Shared/Volo/CmsKit/CmsKitErrorCodes.cs
+++ b/modules/cms-kit/src/Volo.CmsKit.Domain.Shared/Volo/CmsKit/CmsKitErrorCodes.cs
@@ -2,6 +2,6 @@
 {
     public static class CmsKitErrorCodes
     {
-        //Add your business exception error codes here...
+        public const string TagAlreadyExist = "CmsKit:0001";
     }
 }
diff --git a/modules/cms-kit/src/Volo.CmsKit.Domain/Volo/CmsKit/Tags/TagAlreadyExistException.cs b/modules/cms-kit/src/Volo.CmsKit.Domain/Volo/CmsKit/Tags/TagAlreadyExistException.cs
new file mode 100644
index 0000000000..6cae0dde92
--- /dev/null
+++ b/modules/cms-kit/src/Volo.CmsKit.Domain/Volo/CmsKit/Tags/TagAlreadyExistException.cs
@@ -0,0 +1,17 @@
+using JetBrains.Annotations;
+using System;
+using Volo.Abp;
+
+namespace Volo.CmsKit.Tags
+{
+    [Serializable]
+    public class TagAlreadyExistException : BusinessException
+    {
+        public TagAlreadyExistException([NotNull] string entityType, [NotNull] string name)
+        {
+            Code = CmsKitErrorCodes.TagAlreadyExist;
+            WithData(nameof(Tag.EntityType), entityType);
+            WithData(nameof(Tag.Name), name);
+        }
+    }
+}
diff --git a/modules/cms-kit/src/Volo.CmsKit.Domain/Volo/CmsKit/Tags/TagManager.cs b/modules/cms-kit/src/Volo.CmsKit.Domain/Volo/CmsKit/Tags/TagManager.cs
index e1e9366a99..042b4e27a9 100644
--- a/modules/cms-kit/src/Volo.CmsKit.Domain/Volo/CmsKit/Tags/TagManager.cs
+++ b/modules/cms-kit/src/Volo.CmsKit.Domain/Volo/CmsKit/Tags/TagManager.cs
@@ -41,7 +41,7 @@ namespace Volo.CmsKit.Tags
         {
             if (await _tagRepository.AnyAsync(entityType, name, tenantId, cancellationToken))
             {
-                throw new BusinessException(message: "Tag already exist!"); // Already Exist
+                throw new TagAlreadyExistException(entityType, name);
             }
 
             return await _tagRepository.InsertAsync(
@@ -63,7 +63,7 @@ namespace Volo.CmsKit.Tags
             if (name != entity.Name &&
                 await _tagRepository.AnyAsync(entity.EntityType, name, entity.TenantId, cancellationToken))
             {
-                throw new BusinessException(message: "Tag already exist!"); // Already Exist
+                throw new TagAlreadyExistException(entity.EntityType, name);
             }
 
             entity.SetName(name);
diff --git a/modules/cms-kit/test/Volo.CmsKit.Application.Tests/Tags/TagAdminAppService_Tests.cs b/modules/cms-kit/test/Volo.CmsKit.Application.Tests/Tags/TagAdminAppService_Tests.cs
index 237434ef9f..4ad0d43468 100644
--- a/modules/cms-kit/test/Volo.CmsKit.Application.Tests/Tags/TagAdminAppService_Tests.cs
+++ b/modules/cms-kit/test/Volo.CmsKit.Application.Tests/Tags/TagAdminAppService_Tests.cs
@@ -3,12 +3,8 @@ using NSubstitute;
 using Shouldly;
 using System;
 using System.Threading.Tasks;
-using Volo.Abp;
-using Volo.Abp.Clients;
 using Volo.Abp.Users;
-using Volo.Abp.Validation;
 using Volo.CmsKit.Admin.Tags;
-using Volo.CmsKit.Public.Tags;
 using Xunit;
 
 namespace Volo.CmsKit.Tags
@@ -46,7 +42,7 @@ namespace Volo.CmsKit.Tags
         [Fact]
         public async Task ShouldThrowException_WhenTagAlreadyExist()
         {
-            await Should.ThrowAsync<BusinessException>(async () => await _tagAdminAppService.CreateAsync(new TagCreateDto
+            await Should.ThrowAsync<TagAlreadyExistException>(async () => await _tagAdminAppService.CreateAsync(new TagCreateDto
             {
                 EntityType = _cmsKitTestData.Content_1_EntityType,
                 Name = _cmsKitTestData.Content_1_Tags[0],