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 cea3375..cfce088 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
@@ -63,14 +63,16 @@ 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.assertTrue(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());
+        // DON'T delete this line
+        accountService.getOrCreateImAccounts(request.getPeople());
         return transactionTemplate.execute(unused -> {
+            Group savedGroup = groupDao.findByBizCode(request.getBizCode(), request.getGroupType(), true)
+                    .orElse(null);
+            BizAssertions.assertTrue(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());
@@ -120,8 +122,8 @@ public class GroupManager {
         accountService.getOrCreateImAccounts(request.getMembers());
         return transactionTemplate.execute(unused -> {
             Group group = getGroupForUpdateOrThrow(request.getTid());
-            BizAssertions.assertFalse(group.isDismissed(), "群已经解散");
             groupSupport.log(group.getTid(), "add-members", request);
+            BizAssertions.assertFalse(group.isDismissed(), "群已经解散");
             // sync members 1
             groupMemberSyncer.syncMembers(group);
             // prepare add members