The Welsh star's nationality has been incorrectly attributed just one day after the South Korean flag was mistakenly displayed ahead of a North Korea Women match
Swansea City midfielder Joe Allen has been listed as English in an official Team GB match programme, in yet another blunder at the Olympics.
The 22-year-old, for whom Goal.com revealed that Liverpool have had a £13.5 million bid accepted, is one of five Wales players representing Great Britain at the London Games.
Fellow Welshmen Ryan Giggs, Craig Bellamy, Neil Taylor and Aaron Ramsey were all correctly identified.
A London 2012 spokesman, Andy Mitchell, told the BBC: "A genuine mistake was made, for which we apologise."
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Furore had already been caused on Wednesday when the North Korea Women refused to take to the pitch at Hampden Park after the South Korean flag was wrongly displayed next to their players' names and pictures in the stadium.