GraphQL Admin API productVariantsBulkUpdate (mutation) not allow to update inventoryQuantity

[ecsdeveloper2]

We are trying to update multiple variants inventoryQuantity for single product but it is showing error : 

{
field: [ 'variants', '0', 'inventoryQuantities' ],
message: 'Inventory quantities can only be provided during create. To update inventory for existing variants, use inventoryAdjustQuantities.'

}

Our script is below

// GraphQL mutation for bulk updating variants

const BULK_UPDATE_VARIANTS = gql`

  mutation productVariantsBulkUpdate($productId: ID!,$variants: [ProductVariantsBulkInput!]!) {

    productVariantsBulkUpdate(productId: $productId, variants: $variants) {

         product {

        id

        variants(first: 10) {

          edges {

            node {

              id

              inventoryQuantity

            }

          }

        }

      }

      userErrors {

        field

        message

      }

    }

  }

`;

async function updateVariantQuantities() {

  try {

    // Example variants to update - replace with your actual variant IDs and quantities

    const productId = "gid://shopify/Product/7128034803775";

    const variants = [

      {

        id: "gid://shopify/ProductVariant/40003114434623",

        inventoryQuantities: {

          availableQuantity: 10,

          locationId: "gid://shopify/Location/36532813887"

        }

      },

      {

        id: "gid://shopify/ProductVariant/40012127830079",

        inventoryQuantities: {

          availableQuantity: 15,

          locationId: "gid://shopify/Location/36532813887"

        }

      }

    ];