Error message help

 9:14:09 Error in expression <esList set [_index, AllowedVehiclesList select _lastIndex];
};
AllowedVehiclesLi>
9:14:09   Error position: <select _lastIndex];
};
AllowedVehiclesLi>
9:14:09   Error Zero divisor
9:14:09 File z\addons\dayz_server\init\server_functions.sqf, line 264
9:14:09 Error in expression <ect _lastIndex];
};
AllowedVehiclesList resize _lastIndex;
};

if (count Allowed>
9:14:09   Error position: <resize...