diff --git a/sql/moz-fx-data-shared-prod/mdn/legacy_action/view.sql b/sql/moz-fx-data-shared-prod/mdn/legacy_action/view.sql
index ba5e6b5f446..db7ef2123e7 100644
--- a/sql/moz-fx-data-shared-prod/mdn/legacy_action/view.sql
+++ b/sql/moz-fx-data-shared-prod/mdn/legacy_action/view.sql
@@ -102,10 +102,20 @@ CREATE OR REPLACE VIEW
         STRUCT(
           ARRAY(
             SELECT AS STRUCT
-              REGEXP_EXTRACT(kv, r'^utm_(.*?)=') AS key,
-              REGEXP_EXTRACT(kv, r'=(.*)$') AS value
+              key,
+              value
             FROM
-              UNNEST(REGEXP_EXTRACT_ALL(JSON_VALUE(event_extra.url), r'[?&](utm_[^&]+)')) AS kv
+              (
+                SELECT
+                  REGEXP_EXTRACT(kv, r'^utm_(.*?)=') AS key,
+                  REGEXP_EXTRACT(kv, r'=(.*)$') AS value,
+                  off
+                FROM
+                  UNNEST(REGEXP_EXTRACT_ALL(JSON_VALUE(event_extra.url), r'[?&](utm_[^&]+)')) AS kv
+                  WITH OFFSET off
+              )
+            QUALIFY
+              ROW_NUMBER() OVER (PARTITION BY key ORDER BY off DESC) = 1
           ) AS page_utm
         ) AS labeled_string,
         STRUCT(CAST(NULL AS ARRAY<STRING>) AS navigator_user_languages) AS string_list,
diff --git a/sql/moz-fx-data-shared-prod/mdn/legacy_page/view.sql b/sql/moz-fx-data-shared-prod/mdn/legacy_page/view.sql
index a79c3f6d633..7a5f41f70f4 100644
--- a/sql/moz-fx-data-shared-prod/mdn/legacy_page/view.sql
+++ b/sql/moz-fx-data-shared-prod/mdn/legacy_page/view.sql
@@ -77,10 +77,20 @@ CREATE OR REPLACE VIEW
         STRUCT(
           ARRAY(
             SELECT AS STRUCT
-              REGEXP_EXTRACT(kv, r'^utm_(.*?)=') AS key,
-              REGEXP_EXTRACT(kv, r'=(.*)$') AS value
+              key,
+              value
             FROM
-              UNNEST(REGEXP_EXTRACT_ALL(JSON_VALUE(event_extra.url), r'[?&](utm_[^&]+)')) AS kv
+              (
+                SELECT
+                  REGEXP_EXTRACT(kv, r'^utm_(.*?)=') AS key,
+                  REGEXP_EXTRACT(kv, r'=(.*)$') AS value,
+                  off
+                FROM
+                  UNNEST(REGEXP_EXTRACT_ALL(JSON_VALUE(event_extra.url), r'[?&](utm_[^&]+)')) AS kv
+                  WITH OFFSET off
+              )
+            QUALIFY
+              ROW_NUMBER() OVER (PARTITION BY key ORDER BY off DESC) = 1
           ) AS page_utm
         ) AS labeled_string,
         STRUCT(CAST(NULL AS ARRAY<STRING>) AS navigator_user_languages) AS string_list,