diff --git a/app/Models/CourseSign.php b/app/Models/CourseSign.php
index c114c73..f89682e 100755
--- a/app/Models/CourseSign.php
+++ b/app/Models/CourseSign.php
@@ -798,14 +798,14 @@ class CourseSign extends SoftDeletesModel
         $courseSignsQuery = self::getStudentList($start_date, $end_date, 1, $course_ids);
 
         // 条件1：人才培训课程类型的用户
-        $courseSigns1 = $courseSignsQuery->whereHas('course', function ($query) {
+        $courseSigns1 = (clone ($courseSignsQuery))->whereHas('course', function ($query) {
             $query->whereHas('typeDetail', function ($q) {
                 $q->where('name', '人才培训');
             });
         })->with(['user.company'])->get();
 
         // 条件2：user.type 包含「人才」的用户
-        $courseSigns2 = $courseSignsQuery->whereHas('user', function ($q) {
+        $courseSigns2 = (clone ($courseSignsQuery))->whereHas('user', function ($q) {
             $q->where('type', 'like', '%人才%')->orWhere('talent_tags', 'like', '%人才%');
         })->with(['user.company'])->get();