In 488 A.D. the then very young, energetic, clever and deceitful king Kavadh succeeded to the throne. The rule was actually in the hands of the most powerful nobleman, Sokhra of the Karen family, who had won fame in the war against the Huns. Sokhra treated the young king with despect as a boy. The king's anger over Sokhra's treatment of him was exploited by another nobleman, Shapur of the Mihran family, who helped Kavadh to remove the regent.
Source: wiktionary