Add unique constraint to the scanner webhook name field

src/olympia/scanners/migrations/0089_alter_scannerwebhook_name.py

@@ -0,0 +1,18 @@
+# Generated by Django 5.2.17 on 2026-09-03 12:17
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('scanners', '0088_alter_scannerqueryrule_run_on_specific_channel'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='scannerwebhook',
+            name='name',
+            field=models.CharField(max_length=100, unique=True),
+        ),
+    ]

src/olympia/scanners/models.py

@@ -345,7 +345,7 @@ class Meta(AbstractScannerRule.Meta):
 
 
 class ScannerWebhook(ModelBase):
-    name = models.CharField(max_length=100)
+    name = models.CharField(max_length=100, unique=True)
     url = models.URLField(max_length=255)
     api_key = models.CharField(max_length=255)
     is_active = models.BooleanField(default=True)

src/olympia/scanners/tests/test_models.py

@@ -3,6 +3,7 @@
 from unittest import mock
 
 from django.core.exceptions import ValidationError
+from django.db.utils import IntegrityError
 
 import pytest
 import time_machine
@@ -849,3 +850,13 @@ def test_save_does_not_recreate_service_account_on_rename(self):
 
         assert webhook.service_account == original_account
         assert UserProfile.objects.count() == expected_count
+
+    def test_name_is_unique(self):
+        ScannerWebhook.objects.create(
+            name='some-name', url='https://example.com', api_key='secret'
+        )
+
+        with pytest.raises(IntegrityError):
+            ScannerWebhook.objects.create(
+                name='some-name', url='https://example.org', api_key='other-secret'
+            )