Et la migration

machines/migrations/0080_auto_20180502_2334.py

@@ -0,0 +1,21 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.6 on 2018-05-03 04:34
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('machines', '0079_auto_20180416_0107'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='ns',
+            name='ns',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, to='machines.Domain'),
+        ),
+    ]