On the doc page
https://doc.ez.no/display/EZP/Upgrading+from+5.3+to+5.4
on "step 3: upgrade the database" where it refers the database upgrade file

ezpublish_legacy/update/database/<mysql|postgresql>/5.4/dbupdate-5.3.0-to-5.4.0.sql

there is also the file

ezpublish_legacy/update/database/mysql/5.4/dbupdate-cluster-5.3.0-to-5.4.0.sql

and it should be referred that this file should also be applied if running in cluster environment.