diff --git a/app/Models/Exam.php b/app/Models/Exam.php
index 71d5de65..04e04898 100644
--- a/app/Models/Exam.php
+++ b/app/Models/Exam.php
@@ -299,7 +299,7 @@ public function users()
         return $this->belongsToMany(User::class, "exam_users", "exam_id", "uid");
     }
 
-    public function OnGoingUsers()
+    public function onGoingUsers()
     {
         return $this->users()->wherePivot("status", ExamUser::STATUS_NORMAL);
     }
diff --git a/app/Repositories/ExamRepository.php b/app/Repositories/ExamRepository.php
index ebcaea9c..35e3cb96 100644
--- a/app/Repositories/ExamRepository.php
+++ b/app/Repositories/ExamRepository.php
@@ -392,7 +392,7 @@ public function assignToUser(int $uid, int $examId, $begin = null, $end = null)
                 throw new NexusException(nexus_trans('exam.claim_by_yourself_only', [], $locale));
             }
             if ($exam->max_user_count > 0) {
-                $claimUserCount = ExamUser::query()->where("exam_id", $examId)->count();
+                $claimUserCount = $exam->onGoingUsers()->count();
                 if ($claimUserCount >= $exam->max_user_count) {
                     throw new NexusException(nexus_trans('exam.reach_max_user_count', [], $locale));
                 }
diff --git a/public/task.php b/public/task.php
index 51e6c4b6..75a1061f 100644
--- a/public/task.php
+++ b/public/task.php
@@ -9,7 +9,7 @@
 $total = (clone $query)->count();
 $perPage = 20;
 list($paginationTop, $paginationBottom, $limit, $offset) = pager($perPage, $total, "?");
-$rows = (clone $query)->offset($offset)->take($perPage)->orderBy('id', 'desc')->withCount("users")->get();
+$rows = (clone $query)->offset($offset)->take($perPage)->orderBy('id', 'desc')->withCount("onGoingUsers")->get();
 $title = nexus_trans('exam.type_task');
 $columnNameLabel = nexus_trans('label.name');
 $columnIndexLabel = nexus_trans('exam.index');
@@ -75,7 +75,7 @@
     $columns[] = sprintf('<td>%s</td>', $row->filterFormatted);
     $columns[] = sprintf('<td>%s</td>', number_format($row->success_reward_bonus));
     $columns[] = sprintf('<td>%s</td>', number_format($row->fail_deduct_bonus));
-    $columns[] = sprintf('<td>%s</td>', sprintf("%s/%s",$row->users_count, $row->max_user_count ?: nexus_trans("label.infinite")));
+    $columns[] = sprintf('<td>%s</td>', sprintf("%s/%s",$row->on_going_users_count ?? 0, $row->max_user_count ?: nexus_trans("label.infinite")));
     $columns[] = sprintf('<td>%s</td>', $row->description);
     $columns[] = sprintf('<td>%s</td>', $claimAction);
     $table .= sprintf('<tr>%s</tr>', implode("", $columns));