Do read first column as index.

cml/ports/source_adapters.py

@@ -157,7 +157,7 @@ class PandasAdapter:
 
     @classmethod
     def read_csv_data(cls, path):
-        data_frame = pd.read_csv(path)
+        data_frame = pd.read_csv(path, index_col=False)
         return PandasAdapter(data_frame)
 
     @property