Fix dataset 1 ghost row bug

hf_store.py

@@ -539,8 +539,8 @@ def _detect_and_flag_new_districts(state_name: str, df: pd.DataFrame, token: str
         known_districts.update(ref_df[ref_df["State"] == state_upper]["District"].unique())
         
     mapped_districts = set()
-    if not dist_df.empty and "Dist_NEW" in dist_df.columns:
-        mapped_districts.update(dist_df[dist_df["State"] == state_upper]["Dist_NEW"].unique())
+    if not dist_df.empty and "Dist_OLD" in dist_df.columns:
+        mapped_districts.update(dist_df[dist_df["State"] == state_upper]["Dist_OLD"].unique())
 
     if "School_District__c" in df.columns:
         scraped_districts = set(df["School_District__c"].dropna().astype(str).str.strip().str.upper().unique())