[BUGS] BUG #14477: Can't start service because of upgrade-like installation

The following bug has been logged on the website:

Bug reference:      14477
Logged by:          Meirav Rath
Email address:      meirav.rath@imperva.com
PostgreSQL version: 9.6.1
Operating system:   RHEL 6.5 x64
Description:

Hi, 
I just installed Postgres 9.6.1 on a machine that did not have any version
of this database on it.
I used the EDB installer and chose every default option in the various
question. 

My problems are:
1. There was no /pgsql/data directory created - postgresql.conf is located
in /opt/PostgreSQL/9.6/data.
2. I tried to start the database with:

-bash-4.1$ postgres -D /opt/PostgreSQL/9.6/data
2016-12-25 17:02:30 IST FATAL:  database files are incompatible with
server
2016-12-25 17:02:30 IST DETAIL:  The data directory was initialized by
PostgreSQL version 9.6, which is not compatible with this version 8.4.20.

I did not download 8.4.2 rpm....


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