diff --git a/packages/graphrag/graphrag/config/enums.py b/packages/graphrag/graphrag/config/enums.py
index 5084f2154b..3238d4b8c8 100644
--- a/packages/graphrag/graphrag/config/enums.py
+++ b/packages/graphrag/graphrag/config/enums.py
@@ -8,6 +8,19 @@
 from enum import Enum
 
 
+class ModelType(str, Enum):
+    """The type of language model to use (deprecated: kept for backward compatibility)."""
+
+    Chat = "chat"
+    """Chat-based language model."""
+    Embedding = "embedding"
+    """Embedding-based language model."""
+
+    def __repr__(self):
+        """Get a string representation."""
+        return f'"{self.value}"'
+
+
 class ReportingType(str, Enum):
     """The reporting configuration type for the pipeline."""
 
diff --git a/packages/graphrag/graphrag/query/indexer_adapters.py b/packages/graphrag/graphrag/query/indexer_adapters.py
index 7119ad842c..a6ded1f9f7 100644
--- a/packages/graphrag/graphrag/query/indexer_adapters.py
+++ b/packages/graphrag/graphrag/query/indexer_adapters.py
@@ -221,5 +221,5 @@ def _filter_under_community_level(
 ) -> pd.DataFrame:
     return cast(
         "pd.DataFrame",
-        df[df.level <= community_level],
+        df[(df.level <= community_level) | df.level.isna()],
     )