Cant run startDB.sh

Cant run startDB.sh

I am using putty to connect to my Service Desk server and start the DB but when i start the DB using sh startDB.sh i got this message:
 pg_ctl: another server might be running; trying to start server anyway
server starting
LOG:  skipping missing configuration file "/opt/ManageEngine/ServiceDeskPlus-MSP/pgsql/data/postgres_ext.conf"
FATAL:  lock file "postmaster.pid" already exists
HINT:  Is another postmaster (PID 29374) running in data directory "/opt/ManageEngine/ServiceDeskPlus-MSP/pgsql/data"?

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