hotfix

services/backend/apps/task/models.py

@@ -111,7 +111,10 @@ class CompetitionTaskAttachment(BaseModel):
         return f"attachments/{instance.id}/file/{filename}"
 
     task = models.ForeignKey(
-        CompetitionTask, on_delete=models.CASCADE, verbose_name="задание"
+        CompetitionTask,
+        on_delete=models.CASCADE,
+        verbose_name="задание",
+        related_name="attachments",
     )
     file = models.FileField(upload_to=file_upload_at, verbose_name="файл")
     bind_at = models.CharField(verbose_name="путь сохранения", max_length=255)