I need to edit the lot number of an item

AI generated answer (using internal Slack threads):

To edit the lot number of an item in NetSuite, you would typically need to access the lot number record associated with the item. This record contains details about the lot, such as which item it applies to, its status, expiration date, and quantity information. However, it's important to note that if the field is not editable in the UI, it's unlikely to be editable in script. This is a common limitation in NetSuite, and it applies to the lot number field as well. If you're experiencing issues with the lot number not being added to the item record, it could be due to a variety of reasons. One possibility is that the items were not created as “Lot Numbered / Serial” items. Another possibility is that there might be an issue with the custom script that is supposed to add the lot number to the item record. Here's a sample script that attempts to set the quantity on hand in the Locations sublist to 0:

javascript
define(["N/record", "N/url", "N/log"], function(r, url, log) {
    var exports = {};

    function zeroQuantity(recordId) {
        var record = r.load({
            id : recordId,
            type : r.Type.INVENTORY_NUMBER
        });
        
        try {
            record.setSublistValue({
                sublistId : 'locations',
                fieldId : 'quantityonhand',
                line : 0,
                value : 0
            });

            record.save({
                enableSourcing : true,
                ignoreMandatoryField : true
            });
        }
        catch (e) {
            alert(e.message);
        }
        var redirect = url.resolveRecord({
            recordType : 'inventorynumber',
            recordId : recordId
        });
        window.location.href = redirect;
    }

    exports.pageInit = function() { return true; };
    exports.zeroQuantity = zeroQuantity;
    return exports;
});

****** Disclaimer: This response was generated by an artificial intelligence assistant based on previous conversations from multiple Slack channels, and may contain inaccuracies or mistakes. ******