Uzbekistani wrestler Soslan Tigiev has been stripped of a second medal after failing an anti-doping test in the International Olympic Committee's (IOC) latest batch of re-analysed samples from Beijing 2008.
Since August 2015 the IOC has been re-testing stored samples from the 2008 Games and London 2012 with improved equipment in a bid to ensure a level playing field.
The latest ruling has resulted in the disqualification of nine athletes who competed in Beijing, six of whom won medals.
Chief among them is Tigiev, who was four years ago was disqualified after winning bronze in London, having tested positive for the banned substance methylhexaneamine.
The 33-year-old has now been ordered to return the silver he won in China six years ago after re-analysis of his sample returned a finding of dehydrochlormethyltestosterone.
The other five medallists to have been disqualified are Kazakh wrestler Taimuraz Tigiyev, Russian steeplechaser Ekaterina Volkova and weightlifting trio Olha Korobka (Ukraine), Nastassia Novikava and Andrei Rybakou (both Belarus).