diff --git a/uniticket/uni_ticket/migrations/0023_alter_ticketassignment_ticket.py b/uniticket/uni_ticket/migrations/0023_alter_ticketassignment_ticket.py
new file mode 100644
index 0000000..546ae2f
--- /dev/null
+++ b/uniticket/uni_ticket/migrations/0023_alter_ticketassignment_ticket.py
@@ -0,0 +1,19 @@
+# Generated by Django 4.2.9 on 2024-10-25 09:33
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('uni_ticket', '0022_alter_ticketassignment_ticket'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='ticketassignment',
+            name='ticket',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='uni_ticket.ticket'),
+        ),
+    ]
diff --git a/uniticket/uni_ticket/models.py b/uniticket/uni_ticket/models.py
index 22d5f6e..3255866 100644
--- a/uniticket/uni_ticket/models.py
+++ b/uniticket/uni_ticket/models.py
@@ -1165,7 +1165,7 @@ class TicketAssignment(TimeStampedModel):
     Ufficio di competenza per la gestione Ticket
     """
 
-    ticket = models.ForeignKey(Ticket, on_delete=models.CASCADE, db_index=False)
+    ticket = models.ForeignKey(Ticket, on_delete=models.CASCADE)
     office = models.ForeignKey(
         OrganizationalStructureOffice, on_delete=models.PROTECT)
     note = models.TextField(blank=True, null=True)