Adam Peaty's new 100-metres breaststroke world record has been adjusted due to a problem with the timing mechanism, the European Swimming Federation (LEN) has announced.
But it will now go into the record books as 57.10 after officials revealed a "configuration delay" of 0.10 seconds affecting the first nine races of the session.
The revised time has no effect on his achievement in the Tollcross pool, given the new mark still eclipses his previous best of 57.13secs set in the Olympic final in Rio in 2016.
LEN said in a statement: "During the afternoon competition session on Saturday 4 August 2018, the LEN Technical Swimming Committee became aware of a potential problem in relation to the race timing equipment for the first nine races of that session.
"Upon thorough investigation it became apparent that the starting mechanism had been incorrectly configured prior to the start of the session which resulted in all reported times being 0.10s faster due to a configuration delay of 0.10s.
"The LEN TSC working with the timing system operators carried out extensive tests to confirm this system configuration error and have, with the benefit of the necessary technical analysis, revised all recorded times for the first nine races during that session.
"The LEN TSC confirms that all times recorded during the first three competition sessions and after the first nine races of that session (subsequently) are accurate."
The second world record set in the session, in which Russia's Kliment Kolesnikov eclipsed Liam Tancock's previous best 50m backstroke time by 0.04secs, is therefore unaffected by the changes.
Peaty is due to launch his bid for a second European gold medal in the 50m breaststroke heats which begin on Tuesday evening.
Chris Spice, British Swimming's national performance director, said in a statement: "We support LEN's vigilance in this matter and appreciate the time they have taken to make sure all times are correct.
"We want this event to be remembered for the amazing achievements of the athletes so it is important that the results are correct.
"We don't want this to take away from Adam's amazing performance which we all experienced in a fantastic arena."