Problems creating functions in MySQL

I'm trying to create the following function in MySQL Workbench:

DELIMITER $$
CREATE FUNCTION 'capturar_consecutivo'() 
RETURNS INT
BEGIN
    DECLARE num INT DEFAULT 0;
    SET num = ( select * from consecutivo);
    RETURN num;
END
$$ DELIMITER ;

but the system throws me an error:

  

Error Code: 1418. This function has none of DETERMINISTIC, NO SQL, or READS SQL DATA in its declaration and binary logging is enabled (you might want to use the less safe log_bin_trust_function_creators variable)

and the truth is that I do not understand what is due because if I run it on a localhost and the system takes it correctly, but in Workbench it does not take it. Can someone tell me if the syntax is correct?