diff --git a/v1_apache-hop dash mapping/predictive_metrics/data_collection.hpl b/v1_apache-hop dash mapping/predictive_metrics/data_collection.hpl
index 167c31c..068b5da 100644
--- a/v1_apache-hop dash mapping/predictive_metrics/data_collection.hpl	
+++ b/v1_apache-hop dash mapping/predictive_metrics/data_collection.hpl	
@@ -93,7 +93,7 @@ SELECT
   COALESCE(COUNT(r.id) FILTER (
     WHERE r.military_registration_date >= ys.year_date 
     AND r.military_registration_date < ys.year_date + INTERVAL '1 year'
-    AND DATE_PART('year', AGE(r.system_create_date, r.birth_date)) < 18
+    AND DATE_PART('year', AGE(r.military_registration_date, r.birth_date)) < 18
   ), 0) AS reaching_17_age,
   COALESCE(COUNT(r.id) FILTER (
     WHERE r.military_registration_date >= ys.year_date