Update metrics/vintage_metrics.py

metrics/vintage_metrics.py

@@ -26,7 +26,7 @@ def calculate_vintage_dpd(
     )
 
     vintage_summary = (
-        mob_df.groupby("reporting_month")
+        mob_df.groupby("booking_vintage")
         .agg(
             total_accounts=("account_id", "nunique"),
             bad_accounts=("bad_flag", "sum"),
@@ -69,7 +69,7 @@ def calculate_vintage_ncl(
     mob_df = df[df["mob"] == mob].copy()
 
     vintage_summary = (
-        mob_df.groupby("reporting_month")
+        mob_df.groupby("booking_vintage")
         .agg(
             total_balance=("balance", "sum"),
             total_ncl=("ncl_amount", "sum")