diff --git a/apps/authentication/migrations/0006_auto_20211227_1059.py b/apps/authentication/migrations/0006_auto_20211227_1059.py
new file mode 100644
index 000000000..945c5ff5c
--- /dev/null
+++ b/apps/authentication/migrations/0006_auto_20211227_1059.py
@@ -0,0 +1,21 @@
+# Generated by Django 3.1.13 on 2021-12-27 02:59
+
+from django.conf import settings
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+        ('authentication', '0005_delete_loginconfirmsetting'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='ssotoken',
+            name='user',
+            field=models.ForeignKey(db_constraint=False, on_delete=django.db.models.deletion.CASCADE, to=settings.AUTH_USER_MODEL, verbose_name='User'),
+        ),
+    ]
diff --git a/apps/authentication/models.py b/apps/authentication/models.py
index 9322fd7f9..58c80ee68 100644
--- a/apps/authentication/models.py
+++ b/apps/authentication/models.py
@@ -44,4 +44,4 @@ class SSOToken(models.JMSBaseModel):
     """
     authkey = models.UUIDField(primary_key=True, default=uuid.uuid4, verbose_name=_('Token'))
     expired = models.BooleanField(default=False, verbose_name=_('Expired'))
-    user = models.ForeignKey('users.User', on_delete=models.PROTECT, verbose_name=_('User'), db_constraint=False)
+    user = models.ForeignKey('users.User', on_delete=models.CASCADE, verbose_name=_('User'), db_constraint=False)