Scarlett Schremmer, a sophomore at the University of Miami, was disqualified from The ANNIKA on Saturday after using an illegal green-reading book earlier in the event.

Schremmer, who has won twice this fall competing for the Hurricanes, shot 69-74 to miss the cut prior to her disqualification.

“Schremmer violated Model Local Rule G-11, which, per the LPGA Rules of Play Card, is in effect during all LPGA Tour competitions, except at off-site local qualifying events,” the LPGA said in a statement. “This Model Local Rule requires that players are limited throughout their round to using only the yardage book that has been approved for use in the competition.”

According to Golfweek‘s Beth Ann Nichols, the LPGA was first alerted to the potential violation on the first day of the tournament, but did not take action against Schremmer until photo evidence surfaced on Saturday.

The penalty for violating the Model Local Rule is two strokes for the first violation, and disqualification for any use thereafter. According to Nichols’ report, photo evidence showed multiple breaches throughout the event.

“I had a green reading yardage book in my bag this week that’s allowed in college golf but isn’t permitted on the LPGA Tour,” Schremmer wrote in a statement on her Instagram story. “That’s on me. I should have checked, and it’s a lesson learned. I had a great week competing out here and I’m grateful to the Doyle family, Pelican and the LPGA for the opportunity. I am excited to continue to work with the goal of playing out here again. Thank you to everyone who came out and supported me this week.”

Schremmer was playing in the event on a sponsor’s exemption after her University of Miami teammate Kai Trump (who played in the event last year) was unable to compete due to wrist surgery. Schremmer is a member of the USGA’s Elite Amateur Program and is ranked 49th in the World Amateur Golf Ranking.