ALTER TABLE `CONFIGURATIONS`
CHANGE COLUMN `json` `values` JSON NULL DEFAULT NULL AFTER `id_configuration`;
/* Error de SQL (1064): You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'JSON NULL DEFAULT NULL AFTER `id_configuration`' at line 2 */
My current version is 9.3.0.5107