diff --git a/yuthon_hr_attendance/models/overtime_approval.py b/yuthon_hr_attendance/models/overtime_approval.py
index da46e4f1c..7464b5d73 100644
--- a/yuthon_hr_attendance/models/overtime_approval.py
+++ b/yuthon_hr_attendance/models/overtime_approval.py
@@ -192,13 +192,14 @@ class OvertimeApprovals(models.Model):
                     if related_model.duration:
                         total_overtime += related_model.duration
 
-            if total_overtime + rec.duration > 36 and not rec.is_thwg:
-                rec.overtime_hours = 0.0
-                message = _('本月已加班时长已超过 36 小时')
-                raise ValidationError(message)
-            else:
                 rec.overtime_hours = total_overtime
 
+    @api.constrains('users_id')
+    def _check_overtime_hours(self):
+        if self.overtime_hours + self.duration > 36 and not self.is_thwg:
+            message = _('本月已加班时长已超过 36 小时')
+            raise ValidationError(message)
+
     @api.depends('start_time', 'end_time', 'attendance_id', 'rest_start_time', 'rest_end_time')
     def _compute_duration(self):
         for rec in self: