Anyone who knows how to correct this error?

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IntegrityError                            Traceback (most recent call last)
<ipython-input-1-395ea8d30e87> in <module>
    489 
    490 if __name__ == '__main__':
--> 491     main()

<ipython-input-1-395ea8d30e87> in main()
    359         ACTOR_5 = (5, 'fname5', 'lname5', 'male')
    360         # insert_ACTOR
--> 361         insert_ACTOR(conn, ACTOR_1)
    362         insert_ACTOR(conn, ACTOR_2)
    363         insert_ACTOR(conn, ACTOR_3)

<ipython-input-1-395ea8d30e87> in insert_ACTOR(conn, ACTOR)
     43               VALUES(?,?,?,?) '''
     44     cur = conn.cursor()
---> 45     cur.execute(sql, ACTOR)
     46     return cur.lastrowid
     47 

IntegrityError: UNIQUE constraint failed: ACTOR.aid