[root@d_c7 pbspro]# /etc/init.d/pbs start
Starting PBS
PBS Home directory /var/spool/pbs needs updating.
Running /opt/pbs/libexec/pbs_habitat to update it.
***

It appears that PostgreSQL has been upgraded independently of PBS Pro.
The PBS Pro database must be manually upgraded. Please refer to the
instructions in the release notes for version 18.1.1 located here:
https://github.com/PBSPro/pbspro/releases
[root@d_c7 pbspro]#