UPDATE rebeccaPennyBidding_bidss AS b
    JOIN (
        SELECT 
            b.id, 
            p.start_date, 
            p.start_time, 
            p.duration
        FROM 
            rebeccaPennyBidding_bidss b
        INNER JOIN (
            SELECT 
                product_id, 
                MAX(timeAdded) AS last_bid_time
            FROM 
                rebeccaPennyBidding_bidss
            GROUP BY 
                product_id
        ) AS latest_bids ON b.product_id = latest_bids.product_id 
                         AND b.timeAdded = latest_bids.last_bid_time
        LEFT JOIN rebeccaPennyBidding_products p ON b.product_id = p.id
        WHERE DATE_ADD(STR_TO_DATE(CONCAT(p.start_date, ' ', p.start_time), '%Y-%m-%d %H:%i:%s'),INTERVAL p.duration SECOND) < '2024-12-22 21:56:42' AND b.winning_time = ''
    ) AS bids_to_update ON b.id = bids_to_update.id
    SET b.winning_time = UNIX_TIMESTAMP(
        DATE_ADD(
            STR_TO_DATE(CONCAT(bids_to_update.start_date, ' ', bids_to_update.start_time), '%Y-%m-%d %H:%i:%s'),
            INTERVAL bids_to_update.duration SECOND
        )
    )
<br>Deadlock found when trying to get lock; try restarting transaction