Addressed comments

models/intermediate/kpis/schema.yml

@@ -5829,7 +5829,8 @@ models:
 
       The unique key corresponds to the deepest granularity of the model,
       in this case: 
-      - date_day, 
+      - date_day,
+      - py_date_day,
       - id_deal,
       - has_id_check.
 
@@ -5837,6 +5838,7 @@ models:
       - dbt_utils.unique_combination_of_columns:
           combination_of_columns:
             - date_day
+            - py_date_day
             - has_payment
             - has_id_check
     columns:
@@ -5846,6 +5848,12 @@ models:
         tests:
           - not_null
 
+      - name: py_date_day
+        data_type: date
+        description: |
+          Date on the previous year of when Guest Journeys have been completed.
+          Note that this date can be NULL for leap days (29th February)
+
       - name: has_payment
         data_type: string
         description: Has there been any guest payments on the guest journey.