Getting error in sql query

Here you go, can you test it please?

DELIMITER //

CREATE PROCEDURE process_batches()
BEGIN
DECLARE batch_size INT DEFAULT 0;
DECLARE batch_limit INT DEFAULT 51; -- Declarar batch_limit
DECLARE done INT DEFAULT 0; -- Variable para controlar la finalización del bucle
DECLARE CONTINUE HANDLER FOR SQLEXCEPTION
BEGIN
ROLLBACK; -- Rollback transaction on error
END;

WHILE batch_size <= batch_limit DO -- Cambiar "WHILE" y agregar "DO"
START TRANSACTION;

UPDATE `CM_AH_Segmentation` SET `Handled` = 1 WHERE `RecordID` <= batch_size;

UPDATE `CM_AccountHolder` AS ah
JOIN `CM_AH_Segmentation` AS cas
ON ah.AccountHolderID = cas.AccountHolderID
AND cas.OldSegment <> cas.NewSegment
SET ah.Segment = cas.NewSegment
WHERE cas.handled = 1;

INSERT INTO `GLB_AuditInfo`(
`ReferenceID`,
`Event`,
`Action`,
`ActorLoginID`,
`AppName`,
`Comment`,
`CreatedOn`
)
SELECT
cahl.CaseID,
'Risk Investigation',
'Update Segmentation',
'System Admin',
'Risk Investigation',
CONCAT(
'Update segment for AH ',
cas.AccountHolderID,
' from ',
cas.OldSegment,
' to ',
cas.NewSegment,
'(',
cas.OldSegment,
')'
),
NOW()
FROM
`CM_AH_Segmentation` cas
JOIN `CM_CaseAccountHolderLink` cahl
ON cahl.AccountHolderORNID = cas.AccountHolderID
WHERE
cas.Handled = 1;

UPDATE `CM_AH_Segmentation` SET `Handled` = 2 WHERE `Handled` = 1;

COMMIT;

SET batch_size = batch_size + 10;

IF batch_size > batch_limit THEN
SET done = 1; -- Si batch_size supera batch_limit, establecer done a 1 para salir del bucle
END IF;
END WHILE;
END //

DELIMITER ;