diff --git a/ruoyi-admin/src/main/java/org/dromara/web/service/SysRegisterService.java b/ruoyi-admin/src/main/java/org/dromara/web/service/SysRegisterService.java
index 14fa0cc27..ddab279bc 100644
--- a/ruoyi-admin/src/main/java/org/dromara/web/service/SysRegisterService.java
+++ b/ruoyi-admin/src/main/java/org/dromara/web/service/SysRegisterService.java
@@ -1,7 +1,6 @@
 package org.dromara.web.service;
 
 import cn.dev33.satoken.secure.BCrypt;
-import cn.hutool.core.util.ObjectUtil;
 import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
 import lombok.RequiredArgsConstructor;
 import org.dromara.common.core.constant.Constants;
@@ -61,8 +60,7 @@ public class SysRegisterService {
 
         boolean exist = TenantHelper.dynamic(tenantId, () -> {
             return userMapper.exists(new LambdaQueryWrapper<SysUser>()
-                .eq(SysUser::getUserName, sysUser.getUserName())
-                .ne(ObjectUtil.isNotNull(sysUser.getUserId()), SysUser::getUserId, sysUser.getUserId()));
+                .eq(SysUser::getUserName, sysUser.getUserName()));
         });
         if (exist) {
             throw new UserException("user.register.save.error", username);
diff --git a/ruoyi-modules/ruoyi-system/src/main/java/org/dromara/system/service/impl/SysUserServiceImpl.java b/ruoyi-modules/ruoyi-system/src/main/java/org/dromara/system/service/impl/SysUserServiceImpl.java
index a4d553b49..2be074bb3 100644
--- a/ruoyi-modules/ruoyi-system/src/main/java/org/dromara/system/service/impl/SysUserServiceImpl.java
+++ b/ruoyi-modules/ruoyi-system/src/main/java/org/dromara/system/service/impl/SysUserServiceImpl.java
@@ -316,8 +316,8 @@ public class SysUserServiceImpl implements ISysUserService, UserService {
      */
     @Override
     public boolean registerUser(SysUserBo user, String tenantId) {
-        user.setCreateBy(user.getUserId());
-        user.setUpdateBy(user.getUserId());
+        user.setCreateBy(0L);
+        user.setUpdateBy(0L);
         SysUser sysUser = MapstructUtils.convert(user, SysUser.class);
         sysUser.setTenantId(tenantId);
         return baseMapper.insert(sysUser) > 0;