Hi @Gowtham_Chendra,
do the checks suggested by @Ramachandra_Tummala, and paste the configuration file here, coz i think there is something wrong inside.

also here it looks like you have already launched a mongod process from the command line:

And you are trying to pull up the mongo service via systemctl when it is actually already running a mongod process launched from the command line.

it’s not very clear to me what you’re trying to do.

BR