Data directory is not a mount point error while upgrading CloudForms 4.1 to 4.2

Issue

After following the upgrade doc - sections 1.3.1 and 14.1, to upgrade my all-in-one cloudforms appliance. The following steps worked fine:

systemctl stop evmserverd
yum update
vmdb
bin/rake db:migrate
bin/rake evm:automate:reset

However, the next step threw an error:

[root@cloudforms41 ~]# /usr/bin/miq_postgres_upgrade.sh
ERROR:  relation "pglogical.subscription" does not exist
LINE 1: SELECT sub_slot_name FROM pglogical.subscription
                                  ^
/var/opt/rh/rh-postgresql94/lib/pgsql/data is not a mount point, exiting.