Allow CorpContact.corporation being null

stages/migrations/0009_corpcontact_corp_nullable.py

@@ -0,0 +1,16 @@
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('stages', '0008_add_logbook'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='corpcontact',
+            name='corporation',
+            field=models.ForeignKey(blank=True, null=True, on_delete=models.deletion.CASCADE, to='stages.Corporation', verbose_name='Institution'),
+        ),
+    ]