When I group by years, the years have a comma

Hello,

I have an chart, whose x axis represents years (text format: "2010", "2011", ect.) and the y axis represents MWh (format number).
When i group by years it adds a comma part to years. How to make it consider the years field as a category ?

SELECT
  (
    FLOOR(
      (
        (
          `consommation_annuelle_par_commune_demo`.`Année` - 2011.25
        ) / 1.25
      )
    ) * 1.25
  ) + 2011.25 AS `Année`,
  SUM(
    `consommation_annuelle_par_commune_demo`.`Consommation (MWh)`
  ) AS `sum`
FROM
  `consommation_annuelle_par_commune_demo`
GROUP BY
  (
    FLOOR(
      (
        (
          `consommation_annuelle_par_commune_demo`.`Année` - 2011.25
        ) / 1.25
      )
    ) * 1.25
  ) + 2011.25
ORDER BY
  (
    FLOOR(
      (
        (
          `consommation_annuelle_par_commune_demo`.`Année` - 2011.25
        ) / 1.25
      )
    ) * 1.25
  ) + 2011.25 ASC

I resolve the problem by going into Administrator setting > metadata table > i change year type to category and MhW type to quantity