managesalespricelistin2 - ReleaseStatusCode on Product Level doesn't seem to work

[MarkTotnes]

Hi all - Hoping somebody else has tried and succesfully 'UnReleased' a PriceList Product Line ?

I am using API :
/sap/bc/srt/scs/sap/managesalespricelistin2
 
However i can't flag a product ReleaseStatusCode as '1' (Not Released)
 
Everything is working and response OK however, in the Clent, the Product is still showing as 'Released'

Body I'm posting: 

<soapenv:Envelope xmlns:soapenv='http://schemas.xmlsoap.org/soap/envelope/' xmlns:glob='http://sap.com/xi/SAPGlobal20/Global'>
    <soapenv:Body>
            <glob:SalesPriceListBundleMaintainRequest_sync>
            <SalesPriceList ActionCode='04'>
                <TypeCode>7PL0</TypeCode>
                <Application>2</Application>
                <ID>BULL03X</ID>
                <ReleaseStatusCode>3</ReleaseStatusCode>
                <ApprovalStatusCode>4</ApprovalStatusCode>
                <!-- <ApprovalStatusCode>2</ApprovalStatusCode> -->
                <Description>BULL03X</Description>
                <StartDate>2025-03-22</StartDate>
                <EndDate>9999-12-31</EndDate>
                <CurrencyCode>GBP</CurrencyCode>
                <AccountID>BULL03X</AccountID>
                <PriceSpecification>
                    <TypeCode>7PR1</TypeCode>
                    <Amount>164</Amount>
                    <ProductID>AS/CT11311386K</ProductID>
                    <ProductTypeCode>1</ProductTypeCode>
                    <ReleaseStatusCode>3</ReleaseStatusCode>
                    <ConsistencyStatusCode>3</ConsistencyStatusCode>
                </PriceSpecification>
                <PriceSpecification>
                    <TypeCode>7PR1</TypeCode>
                    <ProductID>AS/11811BB/12505/76</ProductID>
                    <ProductTypeCode>1</ProductTypeCode>
                    <ReleaseStatusCode>1</ReleaseStatusCode>
                </PriceSpecification>
            </SalesPriceList>
        </glob:SalesPriceListBundleMaintainRequest_sync>
    </soapenv:Body>
</soapenv:Envelope>