diff --git a/.gitignore b/.gitignore
index 3ed1c2d5..f40283c0 100644
--- a/.gitignore
+++ b/.gitignore
@@ -52,3 +52,4 @@ __pycache__/
 # Local docker-compose overlay (e.g. to mount/install a private app bundle)
 /docker-compose.override.yml
 
+/Makefile
diff --git a/packages/serveradmin/serveradmin/querylog/migrations/0002_on_delete_cascade.py b/packages/serveradmin/serveradmin/querylog/migrations/0002_on_delete_cascade.py
new file mode 100644
index 00000000..062df6ba
--- /dev/null
+++ b/packages/serveradmin/serveradmin/querylog/migrations/0002_on_delete_cascade.py
@@ -0,0 +1,42 @@
+# Generated by Django 5.2.17 on 2026-10-09 07:29
+
+import django.db.models.deletion
+from django.conf import settings
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('apps', '0004_application_last_login'),
+        ('querylog', '0001_initial'),
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='querylog',
+            name='application',
+            field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.CASCADE, related_name='query_logs', to='apps.application'),
+        ),
+        migrations.AlterField(
+            model_name='querylog',
+            name='rule',
+            field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.CASCADE, related_name='logs', to='querylog.queryloggingrule'),
+        ),
+        migrations.AlterField(
+            model_name='querylog',
+            name='user',
+            field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.CASCADE, related_name='query_logs', to=settings.AUTH_USER_MODEL),
+        ),
+        migrations.AlterField(
+            model_name='queryloggingrule',
+            name='application',
+            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.CASCADE, related_name='query_logging_rules', to='apps.application'),
+        ),
+        migrations.AlterField(
+            model_name='queryloggingrule',
+            name='user',
+            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.CASCADE, related_name='query_logging_rules', to=settings.AUTH_USER_MODEL),
+        ),
+    ]
diff --git a/packages/serveradmin/serveradmin/querylog/models.py b/packages/serveradmin/serveradmin/querylog/models.py
index a77ce73e..8fca5d28 100644
--- a/packages/serveradmin/serveradmin/querylog/models.py
+++ b/packages/serveradmin/serveradmin/querylog/models.py
@@ -69,11 +69,11 @@ class QueryLoggingRule(models.Model):
     """
 
     application = models.ForeignKey(
-        Application, null=True, blank=True, on_delete=models.SET_NULL,
+        Application, null=True, blank=True, on_delete=models.CASCADE,
         related_name='query_logging_rules',
     )
     user = models.ForeignKey(
-        User, null=True, blank=True, on_delete=models.SET_NULL,
+        User, null=True, blank=True, on_delete=models.CASCADE,
         related_name='query_logging_rules',
     )
     is_active = models.BooleanField(
@@ -230,15 +230,15 @@ class Source(models.TextChoices):
         SERVERSHELL = 'servershell', 'Servershell'
 
     rule = models.ForeignKey(
-        QueryLoggingRule, null=True, on_delete=models.SET_NULL,
+        QueryLoggingRule, null=True, on_delete=models.CASCADE,
         related_name='logs',
     )
     application = models.ForeignKey(
-        Application, null=True, on_delete=models.SET_NULL,
+        Application, null=True, on_delete=models.CASCADE,
         related_name='query_logs',
     )
     user = models.ForeignKey(
-        User, null=True, on_delete=models.SET_NULL,
+        User, null=True, on_delete=models.CASCADE,
         related_name='query_logs',
     )
     source = models.CharField(max_length=16, choices=Source.choices)