diff --git a/app/chat/model/ChatGroup.php b/app/chat/model/ChatGroup.php
index 0108bd9..ef6f0ef 100644
--- a/app/chat/model/ChatGroup.php
+++ b/app/chat/model/ChatGroup.php
@@ -41,9 +41,10 @@ class ChatGroup extends BaseModel
         $now = d();
         try {
             Db::startTrans();
+            $group_id = Random::build('alnum', 32);
             // 创建群
-            $group_id = Db::name('chat_group')->insertGetId([
-                'id' => Random::build('alnum', 32),
+            Db::name('chat_group')->insertGetId([
+                'id' => $group_id,
                 'name' => $name,
                 'shop_id' => $shop_id,
                 'avatar' => $avatar,