ALTER TABLE `callcenter_test_tracking`
    ADD COLUMN IF NOT EXISTS `direccion` TEXT NULL AFTER `user_id`,
    ADD COLUMN IF NOT EXISTS `referencia` TEXT NULL AFTER `direccion`,
    ADD COLUMN IF NOT EXISTS `sede` VARCHAR(120) NULL AFTER `referencia`,
    ADD COLUMN IF NOT EXISTS `ciudad` VARCHAR(120) NULL AFTER `sede`,
    ADD COLUMN IF NOT EXISTS `distrito` VARCHAR(120) NULL AFTER `ciudad`,
    ADD COLUMN IF NOT EXISTS `dni` VARCHAR(40) NULL AFTER `distrito`,
    ADD COLUMN IF NOT EXISTS `observaciones` TEXT NULL AFTER `dni`,
    ADD COLUMN IF NOT EXISTS `proxima_llamada_at` DATETIME NULL AFTER `observaciones`,
    ADD COLUMN IF NOT EXISTS `ultima_gestion_at` DATETIME NULL AFTER `proxima_llamada_at`;