Relacionamentos JPA ao persistir

Boa noite Galera!
Estou tendo problema ao salvar um Quiz.

object references an unsaved transient instance - save the transient instance before flushing : plataforma.cardioweb.model.Answer.alternative -> plataforma.cardioweb.model.Alternative

Já tentei colocar os cascade e outras coisas, mas não resolveu, não consegui entender oque ta errado.

Essa alternative que eu uso na Answer já existe no banco, só quero salvar Quiz e Answer, não faz sentido esse erro.

Tenho as seguintes classes, com os seguintes mapeamentos.

public class Quiz implements Serializable {

private static final long serialVersionUID = 9127541877030609013L;

@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Column(name = "QUIZ_ID")
private Long quizId;

@OneToOne
@JoinColumn(name = "COMPANY_ID")
private Company company;

@JsonFormat(pattern = "dd-MM-yyyy hh:mm:ss")
@JsonSerialize(using = LocalDateTimeSerializer.class)
@JsonDeserialize(using = LocalDateTimeDeserializer.class)
@Column(name = "INCLUSION_DATE")
private LocalDateTime inclusionDate;

@OneToMany(mappedBy = "quiz", cascade = {CascadeType.PERSIST, CascadeType.REMOVE})
private List<Answer> answers;

}

public class Answer implements Serializable {

private static final long serialVersionUID = 7119174725032674042L;

@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Column(name = "ANSWER_ID")
private Long answerId;

@OneToOne
@JoinColumn(name = "QUESTION_ID")
private Question question;

@ManyToOne
@JoinColumn(name = "QUIZ_ID")
private Quiz quiz;

@OneToOne
@JoinColumn(name = "ALTERNATIVE_ID")
private Alternative alternative;

@Column(name = "OTHER_VALUE")
private String otherValue;

@Column(name = "OPTION_VALUE")
private Integer optionValue;

@JsonFormat(pattern = "dd-MM-yyyy hh:mm:ss")
@JsonSerialize(using = LocalDateTimeSerializer.class)
@JsonDeserialize(using = LocalDateTimeDeserializer.class)
@Column(name = "INCLUSION_DATE")
private LocalDateTime inclusionDate;

}

public class Alternative implements Serializable {

private static final long serialVersionUID = 8518695669261487046L;

@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Column(name = "ALTERNATIVE_ID")
private Long alternativeId;

@Column(name = "DESCRIPTION")
private String description;

@Column(name = "OPTION_VALUE")
private Integer optionValue;

@JsonBackReference
@ManyToOne
@JoinColumn(name = "QUESTION_ID")
private Question question;

@OneToOne(mappedBy = "alternative", cascade = CascadeType.REFRESH)
private Answer answer;

}

Experimenta fazer um merge do alternative antes de salvar o Answer.