Message before executing scripts

Why this message sometimes appear before executing scripts? And sometimes not.

/nix/store/zqk3m21442kvpjwd3rh41wdavqkzkyik-python3-wrapper/bin/python3 $file

Is it possible to make it not appear?

Welcome to the community, @arawin!
This message is completely normal. If you would like to remove it, go to your .replit file and put this at line 1: run = "clear && python3".