Add Order.custom_followup_at (#2124)

src/pretix/base/migrations/0193_auto_20210611_1355.py

@@ -0,0 +1,25 @@
+# Generated by Django 3.2.3 on 2021-06-11 13:55
+
+import django.db.models.manager
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pretixbase', '0192_checkin_more_fields'),
+    ]
+
+    operations = [
+        migrations.AlterModelManagers(
+            name='checkin',
+            managers=[
+                ('all', django.db.models.manager.Manager()),
+            ],
+        ),
+        migrations.AddField(
+            model_name='order',
+            name='custom_followup_at',
+            field=models.DateField(blank=True, null=True),
+        ),
+    ]