Theres probably a script you added and forgot about. Try clicking on the Hello World in your output it will usually lead to the script then just click stop and delete it.
Maybe disable half your plugins and test. Then disable the other half. See if you can narrow it down that way. I’m assuming the output doesn’t allow you to click it and bring up the file that is doing the printing.
You can click on the “Hello World” on the console, it will open up the script, then when you stop playing you can right click on the script and go to the script’s location and delete it