Make complete_at allow null

hosting/migrations/0063_auto_20201223_0612.py

@@ -0,0 +1,20 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.9.4 on 2020-12-23 06:12
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('hosting', '0062_incompletesubscriptions'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='incompletesubscriptions',
+            name='completed_at',
+            field=models.DateTimeField(null=True),
+        ),
+    ]