The 10,000m records set by Eilish McColgan in the 2022 Great Scottish Run have been invalidated after the course was found to be 150m short.
But human error meant an area was not laid out in line with agreed plans.
"We have been in touch with Eilish to explain and to apologise," said Paul Foster of the Great Run Company.
It is the second time the Great Scottish Run has fallen short after the half-marathon course in 2016 was found to be about 150m shy in distance.
That error invalidated the record set by Scotsman Callum Hawkins, who won this year's men's half marathon in 1:03:35 ahead of Adam Craig and his brother Derek.
The Great Run Company say the error had a marginal knock on to the half marathon, but it was within tolerance and the course was valid.
"We will be reviewing our internal processes to ensure we cannot make this mistake again," added Foster, the chief executive of the organisers.
"There are no excuses for this happening and we're very sorry. We know we've let our customers down."
The Newcastle-based company said after the 2016 that several extra check steps had been implemented to ensure the situation would not be repeated.
More to follow.