Never forget your passport.

LPGA star Lexi Thompson’s travel mistake led to approximately 40 golfers missing out on a practice round Monday at Woburn Golf Club, the site of the Women’s British Open.

According to the Golf Channel, Ian Wright — who caddied for golf legend Seve Ballesteros — was driving clubs from France to England for what Wright estimated was 38 players when he got a call asking him to pull over because Thompson’s passport was in one of the bags. The hangup caused Wright to be five-to-six hours late, and the club didn’t allow players on the course.

Thompson’s caddie Benji Thompson took a cab to retrieve the passport. Wright was delayed for three hours and caused him to miss a ferry ride to England, which led the van to get stuck in rush hour traffic.

Thompson ended up having her initial flight cancelled because of a British Airways strike,

“Forgetting her passport, that was an honest mistake,” her agent Bobby Kreusler told Golf Channel. “And she had no idea retrieving it would cause the delay it did, or that it would impact other players the way it did. She would never have wanted that.”

At least one affected player didn’t appear to be angry at Thompson’s blunder.

“Things happen, and there isn’t much you can do about it,” Stacy Lewis said.