Eilish McColgan's 10,000-metre record set at the Great Scottish Run has been ruled invalid as the course was 150m too short.
The Commonwealth champion set a new British record, and beat her own European time, by finishing in 30 minutes 18 seconds.
But the time has now been scrapped after race organisers revealed that human error led to the track being too short.
Paul Foster, CEO of the Great Run company, said in a statement: "We have been in touch with Eilish to explain and to apologise.
"We will be reviewing our internal processes to ensure we cannot make this mistake again. There are no excuses for this happening and we're very sorry. We know we've let our customers down."
The company have offered those who took part a 10 per cent entry discount for next year's race.
The Great Scottish Run has previous, with the half-marathon course in 2016 also found to be 150m too short and also so Callum Hawkins' record time of 60m22s wiped.