diff --git a/swh/web/common/migrations/0005_remove_duplicated_authorized_origins.py b/swh/web/common/migrations/0005_remove_duplicated_authorized_origins.py
new file mode 100644
index 00000000..e4f78f80
--- /dev/null
+++ b/swh/web/common/migrations/0005_remove_duplicated_authorized_origins.py
@@ -0,0 +1,28 @@
+# Copyright (C) 2019  The Software Heritage developers
+# See the AUTHORS file at the top-level directory of this distribution
+# License: GNU Affero General Public License version 3, or any later version
+# See top-level LICENSE file for more information
+
+from __future__ import unicode_literals
+
+from django.db import migrations
+
+from swh.web.common.models import SaveAuthorizedOrigin
+
+
+def _remove_duplicated_urls_in_authorized_list(apps, schema_editor):
+    sao = SaveAuthorizedOrigin.objects
+    for url in sao.values_list('url', flat=True).distinct():
+        sao.filter(pk__in=sao.filter(
+            url=url).values_list('id', flat=True)[1:]).delete()
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('swh.web.common', '0004_auto_20190204_1324'),
+    ]
+
+    operations = [
+        migrations.RunPython(_remove_duplicated_urls_in_authorized_list)
+    ]