diff --git a/app/Models/CourseSign.php b/app/Models/CourseSign.php
index b35bde8..dd501ef 100755
--- a/app/Models/CourseSign.php
+++ b/app/Models/CourseSign.php
@@ -285,7 +285,7 @@ class CourseSign extends SoftDeletesModel
                 // 未去重
                 'total' => $sourseSignList2->count(),
                 // 已去重
-                'total_unique' => User::groupBy('mobile')->whereIn('id', $sourseSignList2->pluck('user_id'))->count(),
+                'total_unique' => User::whereIn('id', $sourseSignList2->pluck('user_id'))->count(),
             ];
 
         }