Harmonized how phenobase index is written to match that of RoiSet dataframes

model_server/rois/phenobase.py

@@ -263,7 +263,12 @@ class PhenoBase(object):
         return self.__class__(self.df.loc[rows], self.root, self.info)
 
     def write_df(self):
-        return self.df.to_csv(self.root / 'phenobase.csv')
+        return self.df.reset_index(
+            col_level=1
+        ).to_csv(
+            self.root / 'phenobase.csv',
+            index=False
+        )
 
     def get_raw_patchstack(self, patch_series: str) -> PatchStack:
         def _get_patch(roi):