diff --git a/utils/dashou_register_service.py b/utils/dashou_register_service.py
index e47b706..e05bcaa 100644
--- a/utils/dashou_register_service.py
+++ b/utils/dashou_register_service.py
@@ -19,13 +19,19 @@ def mark_guanshi_qr_scanned(user_main, invite_code_raw):
     """
     仅当请求明确带了管事邀请码（真实扫码）时，标记用户已扫过管事二维码。
     空邀请码走默认码注册的不标记，避免误开隐藏商品。
+    已是打手/老用户同样必须写入，注册流程可跳过，标记不可跳过。
     """
     if not user_main or not (invite_code_raw or '').strip():
-        return
-    if getattr(user_main, 'guanshi_saoma', 0) == 1:
-        return
-    UserMain.objects.filter(pk=user_main.pk).update(guanshi_saoma=1)
+        return False
+    updated = UserMain.objects.filter(pk=user_main.pk).exclude(guanshi_saoma=1).update(guanshi_saoma=1)
     user_main.guanshi_saoma = 1
+    if updated:
+        logger.info(
+            '扫管事码标记已写入 yonghuid=%s invite=%s',
+            getattr(user_main, 'yonghuid', ''),
+            (invite_code_raw or '')[:20],
+        )
+    return True
 
 
 def resolve_guanshi_for_dashou_register(invite_code):
diff --git a/yonghu/views.py b/yonghu/views.py
index 862047e..4243b35 100644
--- a/yonghu/views.py
+++ b/yonghu/views.py
@@ -1390,13 +1390,13 @@ class DashouZhuceView(APIView):
                     'data': None
                 }, status=status.HTTP_404_NOT_FOUND)
 
-            # 真实扫码（带了邀请码）才标记，空码走默认不标记
+            # 扫码标记：在「是否已是打手」判断之前写入，已注册也会写，绝不跳过
             mark_guanshi_qr_scanned(current_user, yaoqingma)
 
             # 2. 检查用户是否已是打手 (使用反向查询，性能最优)
             try:
                 dashou_profile = current_user.dashou_profile
-                # 用户已是打手，直接返回现有信息
+                # 用户已是打手，直接返回现有信息（标记已在上方写完）
                 return self.fanhuiXianyouDashouXinxi(dashou_profile, current_user)
             except UserDashou.DoesNotExist:
                 # 用户不是打手，继续注册流程