diff --git a/web/modules/custom/geo_upgrade/migrations/upgrade_d7_url_alias.yml b/web/modules/custom/geo_upgrade/migrations/upgrade_d7_url_alias.yml
index 79ed93b..10a9af6 100644
--- a/web/modules/custom/geo_upgrade/migrations/upgrade_d7_url_alias.yml
+++ b/web/modules/custom/geo_upgrade/migrations/upgrade_d7_url_alias.yml
@@ -29,12 +29,12 @@ process:
       # Content that wasn't migrated so the alias won't be migrate either.
       value:
         - 'event/' # Content type Event
-        - 'issue/' # Taxonomy vocabulary Issue
+        - 'issue/' # This vocabulary wasn't migrated.
         - 'regular-contributors/' # Regular contributors
-        - 'geo-volume-2/'
-        - 'geo-volume-3/'
-        - 'geo-volume-1/'
-        - 'ad-groups'
+        - 'geo-volume-2/' # This vocabulary wasn't migrated.
+        - 'geo-volume-3/' # This vocabulary wasn't migrated.
+        - 'geo-volume-1/' # This vocabulary wasn't migrated.
+        - 'ad-groups' # This vocabulary wasn't migrated.
     -
       plugin: concat
       source: