Error Code: 1136. Column count doesn't match value count at row 1 I'm struggling here. This is my code 

CREATE DEFINER=`****`@*****` PROCEDURE `setCountry`(
    IN `countryname` VARCHAR(100) CHARSET utf8mb4,
    IN `nationality` VARCHAR(100) CHARSET utf8mb4,
    IN `countryPrefix` INT(3)
)
    MODIFIES SQL DATA
INSERT INTO country(
    countryName,
    nationality,
    countryPrefix
)
SELECT
    @countryname
FROM
    (
    SELECT
        @countryname AS countryName,
        @nationality AS nationality,
        @countryprefix AS countryPrefix
) AS tmp
WHERE NOT EXISTS
    (
    SELECT
        countryName
    FROM
        country
    WHERE
        countryName = @countryname
)
LIMIT 1


And i'm trying to execute code with this sentence 

call ccc.setCountry('Togo', 'Togolese', 228);


The ERROR it displays is this :


  
    Error Code: 1136. Column count doesn't match value count at row 1
Change from 

SELECT
    @countryname
FROM
    (
    SELECT
        @countryname AS countryName,
        @nationality AS nationality,
        @countryprefix AS countryPrefix

to

SELECT
    @countryname AS countryName,
    @nationality AS nationality,
    @countryprefix AS countryPrefix