diff --git a/src/main/java/com/ai/da/service/impl/AccountServiceImpl.java b/src/main/java/com/ai/da/service/impl/AccountServiceImpl.java
index d5a2daee..6fe96c43 100644
--- a/src/main/java/com/ai/da/service/impl/AccountServiceImpl.java
+++ b/src/main/java/com/ai/da/service/impl/AccountServiceImpl.java
@@ -2550,6 +2550,8 @@ public class AccountServiceImpl extends ServiceImpl<AccountMapper, Account> impl
             }
             subAccount.setSystemUser(subUserRole);
             subAccount.setLanguage(Language.ENGLISH.name());
+            subAccount.setValidStartTime(adminAcc.getValidStartTime());
+            subAccount.setValidEndTime(adminAcc.getValidEndTime());
             subAccount.setCreateDate(new Date());
             subAccount.setIsTrial(0);
             subAccount.setIsBeginner(1);
diff --git a/src/main/java/com/ai/da/service/impl/CollectionSortServiceImpl.java b/src/main/java/com/ai/da/service/impl/CollectionSortServiceImpl.java
index b970201b..d922754d 100644
--- a/src/main/java/com/ai/da/service/impl/CollectionSortServiceImpl.java
+++ b/src/main/java/com/ai/da/service/impl/CollectionSortServiceImpl.java
@@ -1,5 +1,6 @@
 package com.ai.da.service.impl;
 
+import com.ai.da.common.config.exception.BusinessException;
 import com.ai.da.mapper.primary.CollectionSortMapper;
 import com.ai.da.mapper.primary.entity.CollectionSort;
 import com.ai.da.model.dto.CollectionSortDTO;
@@ -8,12 +9,14 @@ import com.ai.da.service.CollectionSortService;
 import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
 import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
 import lombok.extern.slf4j.Slf4j;
+import org.springframework.dao.DuplicateKeyException;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 import org.springframework.util.CollectionUtils;
 
 import java.time.LocalDateTime;
 import java.util.List;
+import java.util.Map;
 import java.util.Objects;
 
 @Slf4j
@@ -50,7 +53,7 @@ public class CollectionSortServiceImpl extends ServiceImpl<CollectionSortMapper,
         return baseMapper.selectOne(qw);
     }
 
-    @Override
+    /*@Override
     public int getNextSort(Long projectId, Long parentId) {
         QueryWrapper<CollectionSort> qw = new QueryWrapper<>();
         qw.lambda().eq(CollectionSort::getProjectId, projectId);
@@ -64,6 +67,39 @@ public class CollectionSortServiceImpl extends ServiceImpl<CollectionSortMapper,
             return 1;
         }
         return userLikeSorts.size() + 1;
+    }*/
+
+    // 添加唯一约束
+    // ALTER TABLE collection_sort ADD UNIQUE KEY sort (project_id, parent_id, sort);
+    public int getNextSort(Long projectId, Long parentId) {
+        int retryCount = 3;
+        while (retryCount-- > 0) {
+            try {
+                Integer maxSort = getMaxSortFromDB(projectId, parentId);
+                return maxSort + 1;
+            } catch (DuplicateKeyException e) {
+                // 如果发生唯一约束冲突，重试
+                if (retryCount == 0) {
+                    throw new BusinessException("获取排序号失败，请重试");
+                }
+            }
+        }
+        throw new BusinessException("获取排序号失败");
+    }
+
+    private Integer getMaxSortFromDB(Long projectId, Long parentId) {
+        QueryWrapper<CollectionSort> qw = new QueryWrapper<>();
+        qw.select("COALESCE(MAX(sort), 0) as maxSort")
+                .eq("project_id", projectId);
+
+        if (null != parentId) {
+            qw.eq("parent_id", parentId);
+        } else {
+            qw.isNull("parent_id");
+        }
+
+        Map<String, Object> result = baseMapper.selectMaps(qw).get(0);
+        return (Integer) result.get("maxSort");
     }
 
     @Override