diff --git a/application/api/model/Tasks.php b/application/api/model/Tasks.php
index b309cedd..ade72aa1 100644
--- a/application/api/model/Tasks.php
+++ b/application/api/model/Tasks.php
@@ -658,7 +658,7 @@ class Tasks extends Model
         $yesterday_sign_in_info = Db::name('vs_user_tasks_sign_in')->where(['user_id'=>$user_id,'sign_in_date'=>date('Y-m-d',strtotime('-1 day'))])->find();
         if(empty($yesterday_sign_in_info)){
             db::name('vs_user_tasks_sign_in')->where(['user_id'=>$user_id,'delete_time'=>0])
-                ->where('sign_in_date','!=',date('Y-m-d'))
+                ->where('sign_in_date','<>',date('Y-m-d'))
                 ->update([
                 'delete_time' => time()
             ]);