Error when using JSON_LISTINGS_FEED to modify B2B prices

[mjb1ifkr]

My request json is below:

{
    "header": {
        "issueLocale": "en_US ",
        "sellerId": "XXXXXX",
        "version": "2.0"
    },
    "messages": [
        {
            "attributes": {
                "purchasable_offer": [
                    {
                        "audience": "ALL",
                        "currency": "USD",
                        "discounted_price": [
                            {
                                "schedule": [
                                    {
                                        "end_at": "2025-01-09",
                                        "start_at": "2025-01-01",
                                        "value_with_tax": 3.98
                                    }
                                ]
                            }
                        ],
                        "list_price": [
                            {
                                "schedule": [
                                    {
                                        "value_with_tax": 6.99
                                    }
                                ]
                            }
                        ],
                        "marketplace_id": "ATVPDKIKX0DER",
                        "maximum_seller_allowed_price": [
                            {
                                "schedule": [
                                    {
                                        "value_with_tax": 6.99
                                    }
                                ]
                            }
                        ],
                        "minimum_seller_allowed_price": [
                            {
                                "schedule": [
                                    {
                                        "value_with_tax": 1.99
                                    }
                                ]
                            }
                        ],
                        "our_price": [
                            {
                                "schedule": [
                                    {
                                        "value_with_tax": 3.99
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "audience": "B2B",
                        "currency": "USD",
                        "marketplace_id": "ATVPDKIKX0DER",
                        "our_price": [
                            {
                                "schedule": [
                                    {
                                        "value_with_tax": 3.29
                                    }
                                ]
                            }
                        ],
                        "quantity_discount_plan": [
                            {
                                "schedule": [
                                    {
                                        "discount_type": "percent",
                                        "levels": [
                                            {
                                                "lower_bound": 5,
                                                "value": 3.29
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    }
                ]
            },
            "messageId": 1,
            "operationType": "PARTIAL_UPDATE",
            "productType": "PRODUCT",
            "sku": "SKU 001"
        }
    ]
}

API Return Error

{
    "header": {
        "sellerId": "XXXXXXXX",
        "version": "2.0",
        "feedId": "384663020090"
    },
    "issues": [
        {
            "messageId": 1,
            "code": "90244",
            "severity": "ERROR",
            "message": "Invalid enumerated value 'B2B' for attribute 'purchasable_offer'.",
            "attributeName": "purchasable_offer"
        }
    ],
    "summary": {
        "errors": 1,
        "warnings": 0,
        "messagesProcessed": 1,
        "messagesAccepted": 0,
        "messagesInvalid": 1
    }
}

https://developer-docs.amazon.com/sp-api/lang-zh_CN/docs/manage-advanced-multiple-offer-multiple-fulfillment-use-cases

Development documents are clearly written very clearly, why will prompt 'B2B' enumeration type error, engaged in a few hours a lot of ways to change not work, as long as the change of B2B price will appear this error!
I'd like some help.

[weilinggu]

@mjb1ifkr Closing this as it is a duplicate of #4485.

Thanks
Weiling
Amazon Selling Partner Services