If, at any time, the county commission is satisfied that any surety on the official bond of the clerk of the commission is a nonresident of the county in which the clerk is acting, is deceased or insolvent, or for any other reason is insufficient, or in danger of becoming insufficient, or that the penalty of the bond of the clerk is not sufficiently large, it shall cause the clerk to enter into a new bond with sufficient security, which shall be deposited in the office of the secretary of state. If any clerk fails to give the bond within thirty days after he is required by the commission to do so, his office shall be vacated and a successor appointed.