Morgan Wallen's not condoning cheating on your significant other ... but, he says his show should be a safe place to do it -- telling his audience he's not gonna snitch like Coldplay!

Morgan Wallen's State Farm Stadium show offset earnest songs with an incendiary "I'm the Problem." And yes, that was ...

The sold-out show on Saturday is an even bigger affair than the two shows by country music superstar Morgan Wallen at the stadium three weeks earlier.