diff --git a/uniticket/uni_ticket/migrations/0022_ticketassignment_uni_ticket__ticket__c1f3e0_idx.py b/uniticket/uni_ticket/migrations/0022_ticketassignment_uni_ticket__ticket__c1f3e0_idx.py
new file mode 100644
index 00000000..5eb3a673
--- /dev/null
+++ b/uniticket/uni_ticket/migrations/0022_ticketassignment_uni_ticket__ticket__c1f3e0_idx.py
@@ -0,0 +1,17 @@
+# Generated by Django 4.2.9 on 2024-10-25 11:40
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('uni_ticket', '0021_alter_task_options_alter_ticketcategorytask_options_and_more'),
+    ]
+
+    operations = [
+        migrations.AddIndex(
+            model_name='ticketassignment',
+            index=models.Index(fields=['ticket_id'], name='uni_ticket__ticket__c1f3e0_idx'),
+        ),
+    ]
diff --git a/uniticket/uni_ticket/models.py b/uniticket/uni_ticket/models.py
index 32558667..a2a27998 100644
--- a/uniticket/uni_ticket/models.py
+++ b/uniticket/uni_ticket/models.py
@@ -1186,7 +1186,8 @@ class TicketAssignment(TimeStampedModel):
     class Meta:
         unique_together = ("ticket", "office")
         ordering = ["created"]
-        indexes = [models.Index(fields=["office_id", "follow"])]
+        indexes = [models.Index(fields=["ticket_id"]),
+                   models.Index(fields=["office_id", "follow"])]
         verbose_name = _("Competenza Ticket")
         verbose_name_plural = _("Competenza Ticket")