Good day. When sending xml to amazon, an error is generated:

Err Descr: XML Parsing Error at Line 1, Column 2104: cvc-complex-type.2.4.d: Invalid content was found with the element 'MetalType'. No child element is expected at this point.

At the same time MetalType is in xml , here is an example:

 <Message> <MessageID>1</MessageID> <OperationType>Update</OperationType> <Product> <SKU>753677728950</SKU> <StandardProductID> <Type>UPC</Type> <Value>753677728950</Value> </StandardProductID> <ProductTaxCode>A_GEN_TAX</ProductTaxCode> <Condition> <ConditionType>New</ConditionType> </Condition> <ItemPackageQuantity>1</ItemPackageQuantity> <NumberOfItems>1</NumberOfItems> <DescriptionData> <Title>Sterling Silver and Baltic Amber Ring "Autumn"</Title> <Brand>HolidayGiftShops</Brand> <Description>Material: Baltic Amber; 925 Sterling Silver Weight 2.7 g This beautiful one of a kind sterling silver Baltic amber ring can be worn for any occasion. It is believed that amber brings luck and protection to people and it has been a symbol of love, marriage and eternal youth. Since amber is a natural stone, its shape and size may vary slightly. Each piece is individually handcrafted in Europe. The ring comes in a gift box. Wear amber and feel the energy of this "beaming sun"! </Description> <BulletPoint>Made of genuine natural Baltic amber imported from the Baltic region of Europe (Poland, Lithuania).</BulletPoint> <BulletPoint>We only use sterling silver for our rings. Each ring is stamped with "925" that ensures 92.5% of silver.</BulletPoint> <BulletPoint>Imported from Baltic region of Europe</BulletPoint> <BulletPoint>Weight 2.7 g</BulletPoint> <MSRP currency="USD">27</MSRP> <Manufacturer>HolidayGiftShops</Manufacturer> <SearchTerms>Oval Large Classic Green Yellow Green Designer</SearchTerms> <SearchTerms>Celtic Small Thin Elliptical Perfect Modern Round</SearchTerms> <SearchTerms>Shape Genuine Natural Baltic Victorian Vintage</SearchTerms> <ItemType>rings</ItemType> <IsGiftWrapAvailable>true</IsGiftWrapAvailable> </DescriptionData> <ProductData> <Jewelry> <ProductType> <FashionRing> <VariationData> <Parentage>child</Parentage> <RingSize>7</RingSize> <MetalType>sterling-silver</MetalType> </VariationData> <Material>Amber</Material> <MetalStamp>925</MetalStamp> <SettingType>bezel-setting</SettingType> <Stone> <GemType>amber</GemType> <StoneShape>baguette-shape</StoneShape> </Stone> <CountryOfOrigin>PL</CountryOfOrigin> <DepartmentName>womens</DepartmentName> </FashionRing> </ProductType> </Jewelry> </ProductData> </Product> </Message>

How to fix this error?

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