Explicitly allow null value for the Registrar IANA ID

netbox_dns/migrations/0027_alter_registrar_iana_id.py

@@ -0,0 +1,17 @@
+# Generated by Django 4.2.5 on 2023-11-16 14:17
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("netbox_dns", "0026_domain_registration"),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name="registrar",
+            name="iana_id",
+            field=models.IntegerField(blank=True, null=True),
+        ),
+    ]

netbox_dns/models/registrar.py

@@ -15,6 +15,7 @@ class Registrar(NetBoxModel):
     )
     iana_id = models.IntegerField(
         verbose_name="IANA ID",
+        null=True,
         blank=True,
     )
     referral_url = models.URLField(