diff --git a/litellm/proxy/management_endpoints/key_management_endpoints.py b/litellm/proxy/management_endpoints/key_management_endpoints.py
index 018c05664..a8b73d43e 100644
--- a/litellm/proxy/management_endpoints/key_management_endpoints.py
+++ b/litellm/proxy/management_endpoints/key_management_endpoints.py
@@ -458,11 +458,7 @@ def prepare_metadata_fields(
     """
     Check LiteLLM_ManagementEndpoint_MetadataFields (proxy/_types.py) for fields that are allowed to be updated
     """
-    non_default_values.setdefault("metadata", {})
-    if non_default_values["metadata"] is None:
-        non_default_values["metadata"] = existing_metadata
-    else:
-        non_default_values["metadata"].update(existing_metadata)
+    non_default_values["metadata"] = existing_metadata
     data_json = data.model_dump(exclude_unset=True)
 
     try: