How to delete all records except one record remaining?

I calling all ids with getIds function and use it in clearSales function.clearSales function is running at the end of the test .When I call clearSales all records deleted. I don't want all records deleted, only one record should remain. How to delete all records except one record according to below function?

const getIds= async () => {
    let res = await axios({
        method: 'get',
        url: '/v1/sales'
    })
    expect(res.status).toBe(200)
    const ids = [];
    res.data.salesId.forEach(item => {
        ids.push(item.id);
    });
    return ids
};

export const clearSales = async () => {
    const idList = await getIds()
    let res = await axios({
        method: 'post',
        url: '/v1/feed/bulk_update',
        data: { "feed_ids": idList, "operation": "delete" },
    })
    expect(res.status).toBe(200)
};

Simply delete the id of the record you want to keep from idList. Here an example of implementation:

export const clearAllOtherSales = async (remainingRecordId) => {
    let idList = await getIds();
    let index = idList.findIndex(id => id === remainingRecordId);
    if (index > -1) idList.splice(index, 1);
    let res = await axios({
        method: 'post',
        url: '/v1/feed/bulk_update',
        data: { "feed_ids": idList, "operation": "delete" },
    });
    expect(res.status).toBe(200);
}

clearAllOtherSales(115) clear all sales except the one with id 115.