diff --git a/sql/upgrades/151.sql b/sql/upgrades/151.sql
--- a/sql/upgrades/151.sql
+++ b/sql/upgrades/151.sql
@@ -7,9 +7,7 @@
 insert into dbversion(version, release, description)
       values(151, now(), 'Work In Progress');
 
-drop function swh_skipped_content_missing;
 drop function swh_content_find;
 drop function swh_directory_missing;
-drop function swh_directory_entry_add;
 drop function swh_revision_walk;
 drop function swh_revision_list_children;