Hi @tnjeff
Exactly What older version? exactly what distribution?
It seems like perhaps you are / were on a very old OSS version.. and then tried to upgrade
Elastic does not work that way... ...now...same distribution FREE / Paid it is just about applying the license. Long ago there was on OSS version
perhaps reload the systemd services
sudo /bin/systemctl daemon-reload
And you made sure the old processes have stopped.
Did you see this?