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Is it possible to update inventoryitem -&gt; itemid field (Not the internal id)?  I have written a suitescript mass update and attempted to set the field to a new value but it doesn’t work.

```/**
 * @NApiVersion 2.x
 * @NScriptType MassUpdateScript
 *
 */
define(['N/record'], function(record) {
    function each(params) {
        try {
            var rec = record.load({type: params.type, id: params.id});
            var new_itemId = rec.getValue('itemid')+" "+rec.getValue('displayname');
            rec.setValue({fieldId: "itemId", value: new_itemId});
            rec.setValue({fieldId: "displayname", value: ""});
            var id = rec.save();
        } catch (e) {
            log.error(funcName, e);
        }
    }
    return {
        each: each
    };
});```

Also, itemid must be unique across items, so it will also fail if you try to write the value which is already present for another item.

it should work fine because it only works across existing items and since its concatenating the existing itemid (Already unique) with more data then it will remain unique

I would simply use a CSV update to make things simple.

Yeah a CSV would be a option if your not trying manage 1.5M products