they have to be '''re-applied'''.
{{Note| There might have been changes of the files in the patch so all customisation needs to be '''re-applied'''. Note that if you have [[PgSQL_Replication|SQL replication]] set up, the right configuration files need to be restored on the master and the standby server, and the initial backup procedure from the master to the standby needs to be applied.}}
==Part 5. Verification of the client/server configuration==