Why use productUpdateMedia without effect

[MengNiuERP]

mutation productUpdateMedia($media: [UpdateMediaInput!]!, $productId: ID!) {

    productUpdateMedia(media: $media, productId: $productId) {

        media {

            id

            alt

            status

            mediaErrors{

                code

                message

                details

            }

        }

        mediaUserErrors{

            code

            field

            message

        }

        product {

            id

            mediaCount{

                count

            }

        }

        userErrors {

            field

            message

        }

    }

}

·························································································································

{

  "media": [

    {

      "alt": "867abf21eacd6195faf824fafa25466f.mp4",

      "id": "gid://shopify/Video/39199419662621"

    },

    {

      "alt": "d1716a812ba7eb5cd962c5d1ac6c5083.png",

      "id": "gid://shopify/MediaImage/39199411896605"

    }

  ],

  "productId": "gid://shopify/Product/9462337470749"

}

·························································································································

{

    "data": {

        "productUpdateMedia": {

            "media": [

                {

                    "id": "gid://shopify/Video/39199419662621",

                    "alt": "867abf21eacd6195faf824fafa25466f.mp4",

                    "status": "READY",

                    "mediaErrors": []

                },

                {

                    "id": "gid://shopify/MediaImage/39199411896605",

                    "alt": "d1716a812ba7eb5cd962c5d1ac6c5083.png",

                    "status": "READY",

                    "mediaErrors": []

                }

            ],

            "mediaUserErrors": [],

            "product": {

                "id": "gid://shopify/Product/9462337470749",

                "mediaCount": {

                    "count": 0

                }

            },

            "userErrors": []

        }

    },

    "extensions": {

        "cost": {

            "requestedQueryCost": 12,

            "actualQueryCost": 12,

            "throttleStatus": {

                "maximumAvailable": 2000.0,

                "currentlyAvailable": 1988,

                "restoreRate": 100.0

            }

        }

    }

}