The German and the 14-year-old bay gelding won the FEI Dressage World Cup Grand Prix - her sixth victory at this French venue.
Just days after making assurances that the international horse show would proceed, organizers have had to pull the plug because of France's 9 p.m. curfew.
The Longines Equita Lyon, Concours Hippique International has been reconfigured and will be held with a maximum of 1,000 spectators.