 But differences between Diaghilev and the director of the Imperial Theatres, Prince Volkonsky, led to the project's cancellation as well as the end of Diaghilev's association with the Imperial Theatres, an event that led Diaghilev to eventually form the original Ballets Russes in 1909.Nevertheless, the ballet was rescheduled for the 1901–1902 season in a version mounted by the Imperial Theatre's "Deuxieme Maître de Ballet" Lev Ivanov, whose death in December 1901 caused the director to hand the project over to the noted "Premier danseur" Pavel Gerdt.Perhaps Ivanov's most lasting contribution to the ballet's history was the change of title from "Sylvia, ou la nymphe de Diane" to simply "Sylvia".