diff --git a/koku/koku/middleware.py b/koku/koku/middleware.py
index a53d962d2f..cc5c9ffeaf 100644
--- a/koku/koku/middleware.py
+++ b/koku/koku/middleware.py
@@ -29,6 +29,7 @@
 from django_tenants.middleware import TenantMainMiddleware
 from prometheus_client import Counter
 
+from api.common import log_json
 from api.common import RH_IDENTITY_HEADER
 from api.common.pagination import EmptyResultsSetPagination
 from api.iam.models import Customer
@@ -247,10 +248,11 @@ class IdentityHeaderMiddleware(MiddlewareMixin):
     def create_customer(account, org_id, request_method):
         """Create a customer.
         Args:
-            account (str): The account identifier
-            org_id (str): The org_id identifier
+            account (str): The account identifier.
+            org_id (str): The org_id identifier.
+            request_method (str): The HTTP request method.
         Returns:
-            (Customer) The created customer
+            Customer : The created  or retrieved customer.
         """
         try:
             with transaction.atomic():
@@ -260,7 +262,16 @@ def create_customer(account, org_id, request_method):
                     customer.save()
                     UNIQUE_ACCOUNT_COUNTER.inc()
                     LOG.info("Created new customer from account_id %s and org_id %s.", account, org_id)
-        except IntegrityError:
+
+        except IntegrityError as err:
+            LOG.warning(
+                log_json(
+                    msg="IntegrityError when creating customer. Attempting to fetch existing record",
+                    account=account,
+                    org_id=org_id,
+                    exc_info=err,
+                )
+            )
             customer = Customer.objects.filter(org_id=org_id).get()
 
         return customer
@@ -426,7 +437,7 @@ def process_response(self, request, response):
 class RequestTimingMiddleware(MiddlewareMixin):
     """A class to add total time taken to a request/response."""
 
-    def process_request(self, request):  # noqa: C901
+    def process_request(self, request):
         """Process request to add start time.
         Args:
             request (object): The request object
diff --git a/koku/koku/test_middleware.py b/koku/koku/test_middleware.py
index f62512f780..65ee4b6909 100644
--- a/koku/koku/test_middleware.py
+++ b/koku/koku/test_middleware.py
@@ -15,6 +15,7 @@
 from cachetools import TTLCache
 from django.core.cache import caches
 from django.core.exceptions import PermissionDenied
+from django.db.utils import IntegrityError
 from django.db.utils import OperationalError
 from django.http import JsonResponse
 from django.test.utils import modify_settings
@@ -482,6 +483,33 @@ def test_process_service_account_identity(self):
         middleware = IdentityHeaderMiddleware(self.mock_get_response)
         middleware.process_request(mock_request)
 
+    @patch("api.iam.models.Customer.save")
+    def test_create_customer(self, mock_save):
+        """Test creating a customer."""
+
+        mock_save.return_value = None
+        customer = IdentityHeaderMiddleware.create_customer("test_account", "test_org", "POST")
+
+        self.assertIsNotNone(customer)
+        self.assertEqual(customer.account_id, "test_account")
+        mock_save.assert_called_once()
+
+    @patch("api.iam.models.Customer.objects.filter")
+    @patch("api.iam.models.Customer.save", side_effect=IntegrityError)
+    def test_create_customer_integrity_error_existing_customer(self, mock_save, mock_filter):
+        """Test fetching an  existing customer when an IntegrityError occurs."""
+
+        mock_query_set = MagicMock()
+        mock_filter.return_value = mock_query_set
+        mock_query_set.get.return_value = MagicMock(account_id="test_account", org_id="test_org")
+
+        customer = IdentityHeaderMiddleware.create_customer("test_account", "test_org", "POST")
+
+        self.assertIsNotNone(customer)
+        mock_save.assert_called_once()
+        self.assertEqual(customer.org_id, "test_org")
+        mock_filter.assert_called_once_with(org_id="test_org")
+
 
 class RequestTimingMiddlewareTest(IamTestCase):
     """Tests against the koku tenant middleware."""
diff --git a/koku/masu/management/commands/migrate_trino_tables.py b/koku/masu/management/commands/migrate_trino_tables.py
index 3fd59bfe5e..9905d3588c 100644
--- a/koku/masu/management/commands/migrate_trino_tables.py
+++ b/koku/masu/management/commands/migrate_trino_tables.py
@@ -343,7 +343,7 @@ def run_trino_sql(sql, schema=None) -> list[t.Optional[list[int]]]:
                 return cur.fetchall()
         except TrinoExternalError as err:
             if err.error_name == "HIVE_METASTORE_ERROR" and n < (retries):
-                LOG.warn(
+                LOG.warning(
                     f"{err.message}. Attempt number {attempt} of {retries} failed. "
                     f"Trying {remaining_retries} more time{'s' if remaining_retries > 1 else ''} "
                     f"after waiting {wait:.2f}s."