diff --git a/graphiti_core/utils/ontology_utils/entity_types_utils.py b/graphiti_core/utils/ontology_utils/entity_types_utils.py
index f6cb08fb..41a94128 100644
--- a/graphiti_core/utils/ontology_utils/entity_types_utils.py
+++ b/graphiti_core/utils/ontology_utils/entity_types_utils.py
@@ -26,12 +26,17 @@ def validate_entity_types(
     if entity_types is None:
         return True
 
-    entity_node_field_names = EntityNode.model_fields.keys()
-
+    # Iterate through the provided entity types
     for entity_type_name, entity_type_model in entity_types.items():
-        entity_type_field_names = entity_type_model.model_fields.keys()
-        for entity_type_field_name in entity_type_field_names:
-            if entity_type_field_name in entity_node_field_names:
-                raise EntityTypeValidationError(entity_type_name, entity_type_field_name)
+        # Convert model fields to set for fast intersection
+        entity_type_field_names = set(entity_type_model.model_fields.keys())
+        # Intersect to find any clashing field
+        conflict_fields = _ENTITY_NODE_FIELD_NAMES & entity_type_field_names
+        if conflict_fields:
+            # Only raise for the first conflict found, as per original behavior
+            raise EntityTypeValidationError(entity_type_name, next(iter(conflict_fields)))
 
-    return True
+    return True  # Preserve existing comment
+
+
+_ENTITY_NODE_FIELD_NAMES = set(EntityNode.model_fields.keys())