diff --git a/caraml-store-serving/src/main/java/dev/caraml/serving/store/bigtable/HBaseSchemaRegistry.java b/caraml-store-serving/src/main/java/dev/caraml/serving/store/bigtable/HBaseSchemaRegistry.java
index 3af2511..6062fdf 100644
--- a/caraml-store-serving/src/main/java/dev/caraml/serving/store/bigtable/HBaseSchemaRegistry.java
+++ b/caraml-store-serving/src/main/java/dev/caraml/serving/store/bigtable/HBaseSchemaRegistry.java
@@ -95,6 +95,7 @@ private GenericDatumReader<GenericRecord> loadReader(SchemaReference reference)
 
       Cell last = result.getColumnLatestCell(COLUMN_FAMILY.getBytes(), QUALIFIER.getBytes());
       if (last == null) {
+        // NOTE: this should never happen
         throw new RuntimeException("Schema not found");
       }
       ByteBuffer schemaBuffer =