diff --git a/modules/identity/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/AbpUserClaimsPrincipalFactory.cs b/modules/identity/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/AbpUserClaimsPrincipalFactory.cs
index 40847b7ba8..9946ac5b37 100644
--- a/modules/identity/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/AbpUserClaimsPrincipalFactory.cs
+++ b/modules/identity/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/AbpUserClaimsPrincipalFactory.cs
@@ -5,31 +5,22 @@ using System.Threading.Tasks;
 using Microsoft.AspNetCore.Identity;
 using Microsoft.Extensions.Options;
 using Volo.Abp.DependencyInjection;
-using Volo.Abp.MultiTenancy;
 using Volo.Abp.Security.Claims;
 using Volo.Abp.Uow;
-using Volo.Abp.Users;
 
 namespace Volo.Abp.Identity
 {
     public class AbpUserClaimsPrincipalFactory : UserClaimsPrincipalFactory<IdentityUser, IdentityRole>, ITransientDependency
     {
-        protected ICurrentUser CurrentUser { get; }
-        protected ICurrentTenant CurrentTenant  { get; }
-
         public AbpUserClaimsPrincipalFactory(
             UserManager<IdentityUser> userManager,
             RoleManager<IdentityRole> roleManager,
-            IOptions<IdentityOptions> options,
-            ICurrentUser currentUser,
-            ICurrentTenant currentTenant)
+            IOptions<IdentityOptions> options)
             : base(
                   userManager,
                   roleManager,
                   options)
         {
-            CurrentUser = currentUser;
-            CurrentTenant = currentTenant;
         }
 
         [UnitOfWork]
diff --git a/modules/identityserver/src/Volo.Abp.IdentityServer.Domain.Shared/Volo/Abp/IdentityServer/Localization/Resources/en.json b/modules/identityserver/src/Volo.Abp.IdentityServer.Domain.Shared/Volo/Abp/IdentityServer/Localization/Resources/en.json
index f974297b06..f582705ce4 100644
--- a/modules/identityserver/src/Volo.Abp.IdentityServer.Domain.Shared/Volo/Abp/IdentityServer/Localization/Resources/en.json
+++ b/modules/identityserver/src/Volo.Abp.IdentityServer.Domain.Shared/Volo/Abp/IdentityServer/Localization/Resources/en.json
@@ -1,4 +1,4 @@
-{
+{
   "culture": "en",
   "texts": {
     "Volo.IdentityServer:DuplicateIdentityResourceName": "Identity Resource name already exist: {Name}",
@@ -7,6 +7,7 @@
     "UserLockedOut": "The user account has been locked out due to invalid login attempts. Please wait a while and try again.",
     "InvalidUserNameOrPassword": "Invalid username or password!",
     "LoginIsNotAllowed": "You are not allowed to login! You need to confirm your email/phone number.",
-    "InvalidUsername": "Invalid username or password!"
+    "InvalidUsername": "Invalid username or password!",
+    "TheTargetUserIsNotLinkedToYou": "The target user is not linked to you!"
   }
-}
\ No newline at end of file
+}
diff --git a/modules/identityserver/src/Volo.Abp.IdentityServer.Domain.Shared/Volo/Abp/IdentityServer/Localization/Resources/tr.json b/modules/identityserver/src/Volo.Abp.IdentityServer.Domain.Shared/Volo/Abp/IdentityServer/Localization/Resources/tr.json
index 60f7a75a77..8a90e54172 100644
--- a/modules/identityserver/src/Volo.Abp.IdentityServer.Domain.Shared/Volo/Abp/IdentityServer/Localization/Resources/tr.json
+++ b/modules/identityserver/src/Volo.Abp.IdentityServer.Domain.Shared/Volo/Abp/IdentityServer/Localization/Resources/tr.json
@@ -7,6 +7,7 @@
     "UserLockedOut": "Kullanıcı hesabı hatalı giriş denemeleri nedeniyle kilitlenmiştir. Lütfen bir süre bekleyip tekrar deneyin.",
     "InvalidUserNameOrPassword": "Kullanıcı adı ya da şifre geçersiz!",
     "LoginIsNotAllowed": "Giriş yapamazsınız! E-posta adresinizi ya da telefon numaranızı doğrulamanız gerekiyor.",
-    "InvalidUsername": "Kullanıcı adı ya da şifre geçersiz!"
+    "InvalidUsername": "Kullanıcı adı ya da şifre geçersiz!",
+    "TheTargetUserIsNotLinkedToYou": "Hedef kullanıcı sizinle bağlantılı değil!"
   }
-}
\ No newline at end of file
+}
diff --git a/modules/identityserver/src/Volo.Abp.IdentityServer.Domain.Shared/Volo/Abp/IdentityServer/Localization/Resources/zh-Hans.json b/modules/identityserver/src/Volo.Abp.IdentityServer.Domain.Shared/Volo/Abp/IdentityServer/Localization/Resources/zh-Hans.json
index ac175e574d..ebe694ec7c 100644
--- a/modules/identityserver/src/Volo.Abp.IdentityServer.Domain.Shared/Volo/Abp/IdentityServer/Localization/Resources/zh-Hans.json
+++ b/modules/identityserver/src/Volo.Abp.IdentityServer.Domain.Shared/Volo/Abp/IdentityServer/Localization/Resources/zh-Hans.json
@@ -7,6 +7,7 @@
     "UserLockedOut": "登录失败,用户账户已被锁定.请稍后再试.",
     "InvalidUserNameOrPassword": "用户名或密码错误!",
     "LoginIsNotAllowed": "无法登录!你需要验证邮箱地址/手机号.",
-    "InvalidUsername": "用户名或密码错误!"
+    "InvalidUsername": "用户名或密码错误!",
+    "TheTargetUserIsNotLinkedToYou": "目标用户未和你有关联!"
   }
-}
\ No newline at end of file
+}
diff --git a/modules/identityserver/src/Volo.Abp.IdentityServer.Domain/Volo/Abp/IdentityServer/AspNetIdentity/LinkLoginExtensionGrantValidator.cs b/modules/identityserver/src/Volo.Abp.IdentityServer.Domain/Volo/Abp/IdentityServer/AspNetIdentity/LinkLoginExtensionGrantValidator.cs
index 3f4ff7dcf2..cc74afa175 100644
--- a/modules/identityserver/src/Volo.Abp.IdentityServer.Domain/Volo/Abp/IdentityServer/AspNetIdentity/LinkLoginExtensionGrantValidator.cs
+++ b/modules/identityserver/src/Volo.Abp.IdentityServer.Domain/Volo/Abp/IdentityServer/AspNetIdentity/LinkLoginExtensionGrantValidator.cs
@@ -17,7 +17,7 @@ namespace Volo.Abp.IdentityServer.AspNetIdentity
 {
     public class LinkLoginExtensionGrantValidator : IExtensionGrantValidator
     {
-        public const string ExtensionGrantType = "LinkUserLogin";
+        public const string ExtensionGrantType = "LinkLogin";
 
         public string GrantType => ExtensionGrantType;
 
@@ -80,8 +80,7 @@ namespace Volo.Abp.IdentityServer.AspNetIdentity
 
             using (CurrentPrincipalAccessor.Change(result.Claims))
             {
-                var linkUserId = Guid.Empty;;
-                if (!StringToGuid(context.Request.Raw["LinkUserId"], ref linkUserId))
+                if (!Guid.TryParse(context.Request.Raw["LinkUserId"], out var linkUserId))
                 {
                     context.Result = new GrantValidationResult
                     {
@@ -94,7 +93,7 @@ namespace Volo.Abp.IdentityServer.AspNetIdentity
                 Guid? linkTenantId = null;
                 if (!context.Request.Raw["LinkTenantId"].IsNullOrWhiteSpace())
                 {
-                    if (!StringToGuid(context.Request.Raw["LinkTenantId"], ref linkTenantId))
+                    if (!Guid.TryParse(context.Request.Raw["LinkUserId"], out var parsedGuid))
                     {
                         context.Result = new GrantValidationResult
                         {
@@ -103,6 +102,8 @@ namespace Volo.Abp.IdentityServer.AspNetIdentity
                         };
                         return;
                     }
+
+                    linkTenantId = parsedGuid;
                 }
 
                 var isLinked = await IdentityLinkUserManager.IsLinkedAsync(
@@ -131,8 +132,7 @@ namespace Volo.Abp.IdentityServer.AspNetIdentity
                     context.Result = new GrantValidationResult
                     {
                         IsError = true,
-                        //TODO: Localizer error message.
-                        Error = "The_Target_User_Is_Not_Linked_ToYou"
+                        Error = Localizer["TheTargetUserIsNotLinkedToYou"]
                     };
                 }
             }
@@ -147,33 +147,5 @@ namespace Volo.Abp.IdentityServer.AspNetIdentity
 
             return Task.CompletedTask;
         }
-
-        protected virtual bool StringToGuid(string str, ref Guid guid)
-        {
-            if (str.IsNullOrWhiteSpace())
-            {
-                return false;
-            }
-
-            if (Guid.TryParse(str, out var g))
-            {
-                guid = g;
-                return true;
-            }
-
-            return false;
-        }
-
-        protected virtual bool StringToGuid(string str, ref Guid? guid)
-        {
-            var g = Guid.Empty;
-            if (StringToGuid(str, ref g))
-            {
-                guid = g;
-                return true;
-            }
-
-            return false;
-        }
     }
 }