diff --git a/events/migrations/0004_unique_constraints.py b/events/migrations/0004_unique_constraints.py
new file mode 100644
index 00000000..3d69f99c
--- /dev/null
+++ b/events/migrations/0004_unique_constraints.py
@@ -0,0 +1,30 @@
+# Generated by Django 2.2.12 on 2020-05-20 15:41
+
+from django.conf import settings
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+        ("events", "0003_options_and_extra_fields"),
+    ]
+
+    operations = [
+        migrations.AlterUniqueTogether(
+            name="extrafield", unique_together={("event", "name")},
+        ),
+        migrations.AlterUniqueTogether(
+            name="extrafieldcontent", unique_together={("field", "registration")},
+        ),
+        migrations.AlterUniqueTogether(
+            name="option", unique_together={("event", "name")},
+        ),
+        migrations.AlterUniqueTogether(
+            name="optionchoice", unique_together={("option", "choice")},
+        ),
+        migrations.AlterUniqueTogether(
+            name="registration", unique_together={("event", "user")},
+        ),
+    ]