Make notification rule ID field UUID and fix default sources

core/migrations/0024_alter_notificationrule_id.py

@@ -0,0 +1,19 @@
+# Generated by Django 4.1.5 on 2023-02-02 19:08
+
+from django.db import migrations, models
+import uuid
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('core', '0023_alter_perms_options'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='notificationrule',
+            name='id',
+            field=models.UUIDField(default=uuid.uuid4, editable=False, primary_key=True, serialize=False),
+        ),
+    ]