However he was severely wounded in the same battle in which his father died and, after much controversy regarding the succession, was persuaded to abdicate later that year by the husband of his sister Prokopia, Michael I (811-813), who succeeded him.
Namun dia terluka parah dalam pertempuran yang sama di mana ayahandanya meninggal dan, setelah banyak kontroversi mengenai suksesi, dibujuk untuk turun takhta pada akhir tahun itu oleh suami dari saudara perempuannya, Prokopia, Mikhaēl I (811-813), yang menggantikannya.