diff --git a/object/syncer_sync.go b/object/syncer_sync.go
index 1761a380..39f17cc8 100644
--- a/object/syncer_sync.go
+++ b/object/syncer_sync.go
@@ -16,7 +16,8 @@ package object
 
 import (
 	"fmt"
-	"time"
+
+	"github.com/casdoor/casdoor/util"
 )
 
 func (syncer *Syncer) syncUsers() error {
@@ -26,17 +27,26 @@ func (syncer *Syncer) syncUsers() error {
 
 	fmt.Printf("Running syncUsers()..\n")
 
-	users, _, _ := syncer.getUserMap()
-	oUsers, _, err := syncer.getOriginalUserMap()
+	users, err := GetUsers(syncer.Organization)
 	if err != nil {
-		fmt.Printf(err.Error())
-
-		timestamp := time.Now().Format("2006-01-02 15:04:05")
-		line := fmt.Sprintf("[%s] %s\n", timestamp, err.Error())
-		_, err = updateSyncerErrorText(syncer, line)
-		if err != nil {
-			return err
+		line := fmt.Sprintf("[%s] %s\n", util.GetCurrentTime(), err.Error())
+		_, err2 := updateSyncerErrorText(syncer, line)
+		if err2 != nil {
+			panic(err2)
 		}
+
+		return err
+	}
+
+	oUsers, err := syncer.getOriginalUsers()
+	if err != nil {
+		line := fmt.Sprintf("[%s] %s\n", util.GetCurrentTime(), err.Error())
+		_, err2 := updateSyncerErrorText(syncer, line)
+		if err2 != nil {
+			panic(err2)
+		}
+
+		return err
 	}
 
 	fmt.Printf("Users: %d, oUsers: %d\n", len(users), len(oUsers))
@@ -76,7 +86,7 @@ func (syncer *Syncer) syncUsers() error {
 					updatedUser.PreHash = oHash
 
 					fmt.Printf("Update from oUser to user: %v\n", updatedUser)
-					_, err = syncer.updateUserForOriginalByFields(updatedUser, key)
+					_, err = syncer.updateUserForOriginalFields(updatedUser, key)
 					if err != nil {
 						return err
 					}
@@ -113,7 +123,7 @@ func (syncer *Syncer) syncUsers() error {
 						updatedUser.PreHash = oHash
 
 						fmt.Printf("Update from oUser to user (2nd condition): %v\n", updatedUser)
-						_, err = syncer.updateUserForOriginalByFields(updatedUser, key)
+						_, err = syncer.updateUserForOriginalFields(updatedUser, key)
 						if err != nil {
 							return err
 						}
diff --git a/object/syncer_user.go b/object/syncer_user.go
index 213ac630..9bef8d91 100644
--- a/object/syncer_user.go
+++ b/object/syncer_user.go
@@ -21,7 +21,6 @@ import (
 	"time"
 
 	"github.com/casdoor/casdoor/util"
-	"github.com/xorm-io/core"
 )
 
 type OriginalUser = User
@@ -50,19 +49,6 @@ func (syncer *Syncer) getOriginalUsers() ([]*OriginalUser, error) {
 	return users, nil
 }
 
-func (syncer *Syncer) getOriginalUserMap() ([]*OriginalUser, map[string]*OriginalUser, error) {
-	users, err := syncer.getOriginalUsers()
-	if err != nil {
-		return users, nil, err
-	}
-
-	m := map[string]*OriginalUser{}
-	for _, user := range users {
-		m[user.Id] = user
-	}
-	return users, m, nil
-}
-
 func (syncer *Syncer) addUser(user *OriginalUser) (bool, error) {
 	m := syncer.getMapFromOriginalUser(user)
 	affected, err := syncer.Ormer.Engine.Table(syncer.getTable()).Insert(m)
@@ -96,31 +82,7 @@ func (syncer *Syncer) updateUser(user *OriginalUser) (bool, error) {
 	return affected != 0, nil
 }
 
-func (syncer *Syncer) updateUserForOriginalFields(user *User) (bool, error) {
-	var err error
-	owner, name := util.GetOwnerAndNameFromId(user.GetId())
-	oldUser, err := getUserById(owner, name)
-	if oldUser == nil || err != nil {
-		return false, err
-	}
-
-	if user.Avatar != oldUser.Avatar && user.Avatar != "" {
-		user.PermanentAvatar, err = getPermanentAvatarUrl(user.Owner, user.Name, user.Avatar, true)
-		if err != nil {
-			return false, err
-		}
-	}
-
-	columns := syncer.getCasdoorColumns()
-	columns = append(columns, "affiliation", "hash", "pre_hash")
-	affected, err := ormer.Engine.ID(core.PK{oldUser.Owner, oldUser.Name}).Cols(columns...).Update(user)
-	if err != nil {
-		return false, err
-	}
-	return affected != 0, nil
-}
-
-func (syncer *Syncer) updateUserForOriginalByFields(user *User, key string) (bool, error) {
+func (syncer *Syncer) updateUserForOriginalFields(user *User, key string) (bool, error) {
 	var err error
 	oldUser := User{}
 
diff --git a/object/syner_db_user.go b/object/syner_db_user.go
deleted file mode 100644
index debbe3ef..00000000
--- a/object/syner_db_user.go
+++ /dev/null
@@ -1,37 +0,0 @@
-// Copyright 2021 The Casdoor Authors. All Rights Reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package object
-
-func (syncer *Syncer) getUsers() []*User {
-	users, err := GetUsers(syncer.Organization)
-	if err != nil {
-		panic(err)
-	}
-
-	return users
-}
-
-func (syncer *Syncer) getUserMap() ([]*User, map[string]*User, map[string]*User) {
-	users := syncer.getUsers()
-
-	m1 := map[string]*User{}
-	m2 := map[string]*User{}
-	for _, user := range users {
-		m1[user.Id] = user
-		m2[user.Name] = user
-	}
-
-	return users, m1, m2
-}