The military led goverment of Ibrahim Badamosi Babangida (IBB) annuled June 12,1993 election.
Although the Cour de Cassation annuled the decision albeit well after the damage had been done.
Lina Ron, by the way, was one of the main organizers of the violence that was present at the very first time the opposition tried to submit a consultative referendum, promptly annuled by the high court.
You are right- he was married to Ali Landry and it was annuled the next week.
So far the supreme court has annuled the results in 120 seats, most of them held by pro-government deputies.