Add explicit primary keys

ohlhafv/migrations/0003_alter_ohlhafvchallenge_id.py

@@ -0,0 +1,18 @@
+# Generated by Django 3.2.14 on 2022-08-01 19:13
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("ohlhafv", "0002_remove_ohlhafvchallenge_challenger_email"),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name="ohlhafvchallenge",
+            name="id",
+            field=models.AutoField(primary_key=True, serialize=False),
+        ),
+    ]

ohlhafv/models.py

@@ -29,6 +29,7 @@ class OhlhafvChallenge(models.Model):
         ("Team", _("Team Challenge (1 x 0.33 L, 2 x 0.5 L, 1 x 1.0 L)")),
     )
 
+    id = models.AutoField(primary_key=True)
     challenger = models.CharField(_("Challenger"), max_length=255)
     victim = models.CharField(_("Victim"), max_length=255)
     victim_email = models.EmailField(_("Victim email"))