diff --git a/app_doc/migrations/0011_auto_20200313_2143.py b/app_doc/migrations/0011_auto_20200313_2143.py
index ca61564..fb36667 100644
--- a/app_doc/migrations/0011_auto_20200313_2143.py
+++ b/app_doc/migrations/0011_auto_20200313_2143.py
@@ -42,7 +42,7 @@ class Migration(migrations.Migration):
         migrations.AddField(
             model_name='image',
             name='group',
-            field=models.ForeignKey(default=0, on_delete=django.db.models.deletion.SET_DEFAULT, to='app_doc.ImageGroup', verbose_name='图片分组'),
+            field=models.ForeignKey(default=-1, on_delete=django.db.models.deletion.SET_DEFAULT, to='app_doc.ImageGroup', verbose_name='图片分组'),
         ),
         migrations.AddField(
             model_name='image',