@@ -0,0 +1,24 @@
+# Generated by Django 5.0.11 on 2025-09-26 14:33
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    atomic = False
+
+    dependencies = [
+        ('authentication', '0020_alter_customusermodel_username'),
+    ]
+
+    operations = [
+        migrations.RunSQL(
+            sql="""
+                CREATE INDEX CONCURRENTLY IF NOT EXISTS idx_users_email_upper
+                ON authentication_customusermodel (UPPER(email));
+            """,
+            reverse_sql="""
+                DROP INDEX CONCURRENTLY IF EXISTS idx_users_email_upper;
+            """
+        )
+    ]
@@ -5,6 +5,7 @@ import traceback
 from drf_spectacular.utils import OpenApiParameter, extend_schema
 from rest_framework.permissions import IsAuthenticated
 from rest_framework.response import Response
+from rest_framework.status import HTTP_402_PAYMENT_REQUIRED
 from rest_framework.views import APIView
 
 from messages.models import Message
@@ -12,6 +13,7 @@ from messages.serializers import MessageSerializer
 from messages.utils import push_message_error
 from ml_model.models import NeuronModel
 from ml_model.services.base import SimpleService
+from payments.exceptions.insufficient_balance import InsufficientBalance
 
 from .models import Audio, Image, Video
 
@@ -148,6 +150,8 @@ class MediaAPIView(APIView):
                 logger.exception(exc)
                 input_message.is_sent = False
                 input_message.save()
+                if isinstance(exc, InsufficientBalance):
+                    return Response({'detail': f'{exc}'}, status=HTTP_402_PAYMENT_REQUIRED)
                 push_message_error(input_message, str(exc), traceback.format_exc())
                 return Response(f'Error: {exc}', status=400)
             return Response(MessageSerializer(output_messages, many=True).data, 201)