diff --git a/litellm/proxy/db/db_spend_update_writer.py b/litellm/proxy/db/db_spend_update_writer.py
index d288e41b37b..819c7daec14 100644
--- a/litellm/proxy/db/db_spend_update_writer.py
+++ b/litellm/proxy/db/db_spend_update_writer.py
@@ -997,7 +997,7 @@ class DBSpendUpdateWriter:
                             # should sort by the table first.
                             key=lambda x: (
                                 x[1]["date"],
-                                x[1].get(entity_id_field),
+                                x[1].get(entity_id_field) or "",
                                 x[1]["api_key"],
                                 x[1]["model"],
                                 x[1]["custom_llm_provider"],