diff --git a/apps/advertisement/migrations/0002_auto_20190917_1307.py b/apps/advertisement/migrations/0002_auto_20190917_1307.py
index b256fa53..6604a979 100644
--- a/apps/advertisement/migrations/0002_auto_20190917_1307.py
+++ b/apps/advertisement/migrations/0002_auto_20190917_1307.py
@@ -9,7 +9,14 @@ def fill_uuid(apps, schemaeditor):
     for a in Advertisement.objects.all():
         a.uuid = uuid.uuid4()
         a.save()
-        
+
+
+def fill_block_level(apps, schemaeditor):
+    Advertisement = apps.get_model('advertisement', 'Advertisement')
+    for a in Advertisement.objects.all():
+        a.block_level = ''
+        a.save()
+
 
 class Migration(migrations.Migration):
 
@@ -45,8 +52,14 @@ class Migration(migrations.Migration):
             name='block_level',
         ),
         migrations.AddField(
+            model_name='advertisement',
+            name='block_level',
+            field=models.CharField(blank=True, null=True, max_length=10, verbose_name='Block level')
+        ),
+        migrations.RunPython(fill_block_level, migrations.RunPython.noop),
+        migrations.AlterField(
             model_name='advertisement',
             name='block_level',
             field=models.CharField(max_length=10, verbose_name='Block level')
-        )
+        ),
     ]