Will give again his reference, right now.
Note that, it is an old topic, from 2018:
Which mention this file.
I really don’t have such older executions / projects into my current machine.
If my memory is intact, i saw such in the past.
Connecting this with the info from the OP:
This project was created in Katalon 6
I assume, it is just a leftover from previous versions.
What is the exact path of it, under the project structure?
I cannot find such under my current demo projects created with Katalon > 8.x
So, I suppose, for usage with newest Katalon, may be safe to just discard it.
Take a backup first!