Why doesn't he see the field in the answer?

[Mystic]

Test available:

@Test
    public void sixTest() {
        FlowerList flowerList = new FlowerList();
        Specification.installSpec(Specification.requestSpec(), Specification.responseSpec());
        Response response = given()
                .when()
                .get("/api/unknown")
                .then()
                .log().all()
                .body("data.year", hasKey("2001"))
                .extract().response().as((Type) FlowerList.class);

I need to check that at least one field year has 2001. But I get an exception:

Expected: map containing ["2001,"->ANYTHING]
  Actual: [2000, 2001, 2002, 2003, 2004, 2005]

What am I doing wrong? Theoretically husKey has to return one value - 2001

get:

{
    page: 1,
    per_page: 6,
    total: 12,
    total_pages: 2,
    data: [
    {
    id: 1,
    name: "cerulean",
    year: 2000,
    color: "#98B2D1",
    pantone_value: "15-4020"
    },
    {
    id: 2,
    name: "fuchsia rose",
    year: 2001,
    color: "#C74375",
    pantone_value: "17-2031"
    },
    ... 

[kalyn]

hasKey Check that there is a field/code with a specified value.
This should be used. https://www.javadoc.io/doc/io.rest-assured/rest-assured/latest/io/restassured/RestAssured.html :

// ...
    .body("data.year", hasItems("2000", "2001"))