pm2 start restarts all apps

When I run the pm2 start pm2.json command, it restarts all of the apps in my ecosystem file. Is this expected behavior? I only want apps that are not already running in my pm2.json file to start running, and ones that are, to keep running and not restart. Each app does use the same code.

example pm2.json

{
  "apps": [
    {
      "name": "my app that is already running",
      "script": "./app.js",
      "args": "-a EVC7781",
      "max_memory_restart": "300M",
      "out_file": "/var/www/html/logs/EVC7781-out.log",
      "error_file": "/var/www/html/logs/EVC7781-error.log",
      "kill_timeout": 5000,
      "restart_delay": 5000,
      "shutdown_with_message": true
    },
    {
      "name": "my new app I just added and want to run",
      "script": "./app.js",
      "args": "-a EVC8326",
      "max_memory_restart": "300M",
      "out_file": "/var/www/html/logs/EVC8326-out.log",
      "error_file": "/var/www/html/logs/EVC8326-error.log",
      "kill_timeout": 5000,
      "restart_delay": 5000,
      "shutdown_with_message": true
    }
  ]
}

Start by reproducing pm2 start pm2.json with the two-app example and inspect how the command handles already running ecosystem entries. Done means newly added apps start while apps already running from the file continue without being restarted.