diff --git a/im-center-server/src/main/java/cn/axzo/im/dao/repository/GroupDao.java b/im-center-server/src/main/java/cn/axzo/im/dao/repository/GroupDao.java
index 5945663..a795556 100644
--- a/im-center-server/src/main/java/cn/axzo/im/dao/repository/GroupDao.java
+++ b/im-center-server/src/main/java/cn/axzo/im/dao/repository/GroupDao.java
@@ -1,5 +1,6 @@
 package cn.axzo.im.dao.repository;
 
+import cn.axzo.im.center.common.enums.GroupType;
 import cn.axzo.im.center.common.enums.YesOrNo;
 import cn.axzo.im.dao.mapper.GroupMapper;
 import cn.axzo.im.entity.Group;
@@ -45,4 +46,12 @@ public class GroupDao extends ServiceImpl<GroupMapper, Group> {
                 .update();
     }
 
+    public Optional<Group> findByBizCode(String bizCode, GroupType groupType, boolean forUpdate) {
+        return lambdaQuery()
+                .eq(Group::getBizCode, bizCode)
+                .eq(Group::getType, groupType)
+                .last(forUpdate, "FOR UPDATE")
+                .oneOpt();
+    }
+
 }
\ No newline at end of file
diff --git a/im-center-server/src/main/java/cn/axzo/im/group/GroupManager.java b/im-center-server/src/main/java/cn/axzo/im/group/GroupManager.java
index 2159f69..ac9e7ff 100644
--- a/im-center-server/src/main/java/cn/axzo/im/group/GroupManager.java
+++ b/im-center-server/src/main/java/cn/axzo/im/group/GroupManager.java
@@ -1,6 +1,5 @@
 package cn.axzo.im.group;
 
-import cn.axzo.basics.common.exception.ServiceException;
 import cn.axzo.im.center.api.enums.MqEventType;
 import cn.axzo.im.center.api.vo.PersonAccountAttribute;
 import cn.axzo.im.center.api.vo.req.GroupAddMembersRequest;
@@ -31,7 +30,6 @@ import com.alibaba.fastjson.JSON;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import org.apache.commons.collections4.CollectionUtils;
-import org.springframework.dao.DuplicateKeyException;
 import org.springframework.stereotype.Component;
 import org.springframework.transaction.annotation.Transactional;
 
@@ -64,18 +62,17 @@ public class GroupManager {
     public GroupCreateResponse createGroup(GroupCreateRequest request) {
         BizAssertions.assertTrue(request.getPeople().size() > 1, "群成员数量(含群主)不能少于2");
         groupSupport.log(0L, "create-group:preparing", request);
+        Group savedGroup = groupDao.findByBizCode(request.getBizCode(), request.getGroupType(), true)
+                .orElse(null);
+        BizAssertions.assertNull(savedGroup == null || savedGroup.isDismissed(),
+                String.format("群已经存在: %s", request.getName()));
         ImAccounts imAccounts = accountService.getOrCreateImAccounts(request.getPeople());
         String owner = imAccounts.findAccount(request.getOwner()).orElse(null);
         BizAssertions.assertNotNull(owner, "群主没有IM账号, 无法创建群. {}", request.getOwner());
         Group group = groupSupport.buildNewGroup(request, imAccounts);
         BizAssertions.assertTrue(group.addMoreMembers(
                 request.getPeople().size()), "无法创建群, 群成员数量超过上限" + group.getMemberLimit());
-        try {
-            groupDao.save(group);
-        } catch (DuplicateKeyException e) {
-            log.warn("重复创建群, request={}", request, e);
-            throw new ServiceException(403, String.format("群已经存在: %s", request.getName()));
-        }
+        groupDao.save(group);
         NimGroupCreateRequest nimRequest = groupSupport
                 .buildNimCreateGroupRequest(request, imAccounts);
         rateLimiter.requireCreateGroup();