CREATE TEMP TABLE backup_loc AS SELECT * FROM asset.copy_location WHERE id = 1;
CREATE TEMP TABLE backup_usr AS SELECT * FROM actor.usr WHERE id = 1;
-CREATE TEMP TABLE backup_card AS SELECT * FROM actor.card WHERE usr = 1;
+CREATE TEMP TABLE backup_card AS SELECT * FROM actor.card WHERE usr IN (SELECT id FROM backup_usr);
UPDATE backup_usr SET card = NULL;