Did you create your session table? This was a thing that got me when I first used Apache::Session.
You can see those docs with perldoc Apache::Session::Store::Postgres
I would also recommend adding an additional timestamp field to the table for future session deletion based on time, it has come in handy for me.

In reply to Re: Trouble with mod_perl, Apache::Session::Postgres, and DBI by trs80
in thread Trouble with mod_perl, Apache::Session::Postgres, and DBI by staunch

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