Node server.js Process Not able to Kill in AWS EC2 instance

I have to go for a fresh deployment and git clone a new repository inside my EC2 instance.

We did git clone XXXXX

Moved to the respective folder

cd XXXXX

And Try running

node server.js

The thing is, this starts my server, but no changes are reflected when I hit the AWS Instance IP/ Public URL on my browser.

When I did a

ps aux | grep node to find if any other node process is on, I found this

nodejs 9183 0.4 ? Sl 10:28 0:13 node server.js

If I do a kill -9 9183

And then again do a ps aux | grep node

Now I see the same node server.js process with a different PID

Not understanding what's happening here.

Thanks in advance and please help.