AX AIF Update EcoResProduct

public async Task<string> UpdateItem(ItemModel model, string CompanyCode)
{
    bool _creating = false;
    if (model.ERPCode == null)
    {
        _creating = true;
        model.ERPCode = model.Code;
    }

    if (_creating)
    {
        EcoResProductService.CallContext EcoResProductCallContext = new EcoResProductService.CallContext();
        EcoResProductCallContext.Company = CompanyCode;
        EcoResProductCallContext.MessageId = Guid.NewGuid().ToString();

        AxdEntity_Product_EcoResProduct[] ecoResProduct = new AxdEntity_Product_EcoResProduct[1];
        ecoResProduct[0] = new AxdEntity_Product_EcoResDistinctProduct();
        ecoResProduct[0].ProductType = model.Type == ItemTypeEnum.Product ? AxdEnum_EcoResProductType.Item : AxdEnum_EcoResProductType.Service;
        ecoResProduct[0].SearchName = model.ERPCode;
        ecoResProduct[0].DisplayProductNumber = model.ERPCode;

        AxdEntity_Translation prodTranslation = new AxdEntity_Translation();
        prodTranslation.Name = model.Name;
        prodTranslation.LanguageId = model.DefaultLanguage;

        ecoResProduct[0].Translation = new[] { prodTranslation };


        AxdEntity_Identifier identifier = new AxdEntity_Identifier();
        identifier.ProductNumber = model.ERPCode;

        ecoResProduct[0].Identifier = new AxdEntity_Identifier[1];
        ecoResProduct[0].Identifier[0] = identifier;


        AxdEcoResProduct product = new AxdEcoResProduct();
        product.Product = ecoResProduct;


        EcoResProductService.EntityKey[] keys = this.clientEcoResProduct.create(EcoResProductCallContext, product);
    }

    ItemsService.CallContext ItemsCallContext = new ItemsService.CallContext();
    ItemsCallContext.Company = CompanyCode;
    ItemsCallContext.MessageId = Guid.NewGuid().ToString();

    AxdEntity_InventTable[] inventTable = new AxdEntity_InventTable[1];
    inventTable[0] = new AxdEntity_InventTable();
    inventTable[0].ItemId = model.ERPCode;
    inventTable[0].NameAlias = model.Name;
    inventTable[0].Product = model.ERPCode;

    //INVENTDIMID
    inventTable[0].Purch = new AxdEntity_Purch[] {
        new AxdEntity_Purch() {
            Price = model.Price,
            PriceSpecified = true,
            UnitId = model.UOM_ERPCode,
            ItemId = inventTable[0].ItemId
        }
    };

    AxdItem items = new AxdItem();
    items.InventTable = inventTable;

    if (_creating)
    {
        this.clientItems.create(ItemsCallContext, items);
    }
    else
    {
        var keys = new ItemsService.EntityKey[] {
            new ItemsService.EntityKey() {
                KeyData = new ItemsService.KeyField[] {
                    new ItemsService.KeyField() {
                        Field = "DisplayProductNumber",
                        Value = model.ERPCode
                    }
                }
            }
        };

        this.clientItems.update(ItemsCallContext, keys, items);
    }

    return model.ERPCode;
}