The reason may be that your WooCommerce store is automatically deleting orders after a certain number of days. Once an order has been deleted, we can no longer receive updates for that order, such as cancellations or failed payment statuses.
To prevent this going forward, please update the relevant WooCommerce settings so that the order deletion values are left empty. This will ensure that order data is retained and that we can continue receiving order updates.
Once this is done, we’ll be able to show the correct order numbers going forward.

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