Can't Update Value in Nested Dictionary Inside List and get the same list structure with updated value

This is how I do it. A nested a!update.

a!localVariables(
  local!groupsEndpointResponse: {
    {
      totalResults: 1,
      startIndex: 1,
      itemsPerPage: 100,
      schemas: { "schema1" },
      Resources: {
        {
          meta: {
            created: fn!datetime(2024, 12, 8, 3, 12, 45, 350),
            lastModified: fn!datetime(2024, 12, 8, 3, 12, 46, 910),
            resourceType: "Group"
          },
          displayName: "Abc",
          members: { { display: "Joe", value: "123" } },
          externalId: "null",
          id: 2
        }
      }
    },
    {
      totalResults: 1,
      startIndex: 1,
      itemsPerPage: 100,
      schemas: { "schema2" },
      Resources: {
        {
          meta: {
            created: fn!datetime(2024, 12, 8, 3, 12, 45, 690),
            lastModified: fn!datetime(2024, 12, 8, 3, 12, 46, 770),
            resourceType: "Group"
          },
          displayName: "lmn",
          members: { { display: "Sam", value: "789" } },
          externalId: "null",
          id: 2
        }
      }
    }
  },
  a!forEach(
    items: local!groupsEndpointResponse,
    expression: a!update(
      data: fv!item,
      index: "Resources",
      value: a!update(
        data: fv!item.Resources,
        index: 1,
        value: a!update(
          data: fv!item.Resources[1],
          index: "id",
          value: 567
        )
      )
    )
  )
)