diff --git a/polls/models.py b/polls/models.py
index 0d1f204..7f3425e 100644
--- a/polls/models.py
+++ b/polls/models.py
@@ -253,8 +253,9 @@ UNQUALIFIED_MEDIA_TYPE_CHOICES = (
 
 class UnqualifiedMedia(models.Model):
     id = models.UUIDField('id', primary_key=True, default=uuid.uuid4)
-    media_id = models.UUIDField('media_id', on_delete=models.CASCADE)
-    type = models.IntegerField('Type', choices=UNQUALIFIED_MEDIA_TYPE_CHOICES, default=0)
+    media_id = models.UUIDField('media_id', null=True, blank=True)
+    type = models.IntegerField(
+        'Type', choices=UNQUALIFIED_MEDIA_TYPE_CHOICES, default=0)
     result = models.TextField('result', null=True, blank=True)
     cou = models.IntegerField('count of update', default=0)
     dos = models.IntegerField('days of silent', default=0)