diff --git a/litellm/proxy/db/db_spend_update_writer.py b/litellm/proxy/db/db_spend_update_writer.py
index e3338a8460..7931252040 100644
--- a/litellm/proxy/db/db_spend_update_writer.py
+++ b/litellm/proxy/db/db_spend_update_writer.py
@@ -872,7 +872,8 @@ class DBSpendUpdateWriter:
                                     "model": transaction["model"],
                                     "custom_llm_provider": transaction.get(
                                         "custom_llm_provider"
-                                    ),
+                                    )
+                                    or "",
                                     "mcp_namespaced_tool_name": transaction.get(
                                         "mcp_namespaced_tool_name"
                                     )