Spring data rest и ошибка разбора mongoDb JSON: не удалось преобразовать тип [java. net .URI] в тип [com..entities]

Question

, пожалуйста, найдите ниже следующие два документа:

PFE:

@Document
 public class Pfe implements Serializable{

private static final long serialVersionUID = 1L;

@Id
private String id;
private String titre;
private String nomComplet;
private Date dateSoutnance;
private String encadrent;
private String departement;
private String universite;
@DBRef
private Collection<Auteur>auteurs=new ArrayList<Auteur>();
}

и Автор

@Document
public class Auteur implements Serializable{
private static final long serialVersionUID = 1L;

@Id
private String id;
private String nom;
private String prenom;
private String email;
@DBRef
private Pfe pfe;
}

Оба документа имеют @RepositoryRestResrouce, и когда я пытаюсь отправить pfe с клиентом angular, с примером тела (json) ниже:

{   titre: "aaa",
    nomComplet: "aaa",
    dateSoutnance: "2020-04-04",
    encadrent: "aa",
    departement: "aaa",
    universite: "aaa",
    auteurs:[{
        nom: "aaa",
        prenom: "aa",
        email: "aa",
        },{
        nom: "ss",
        prenom: "ss",
        email: "ss",
        }]
}       

У меня внутренняя ошибка сервера:

org.springframework.http.converter.HttpMessageNotReadableException: JSON parse error: Failed to convert from type [java.net.URI] to type [com.yaacoub.entities.Auteur] for value 'nom'; nested exception is java.lang.IllegalArgumentException: Cannot resolve URI nom. Is it local or remote? Only local URIs are resolvable.; nested exception is com.fasterxml.jackson.databind.JsonMappingException: Failed to convert from type [java.net.URI] to type [com.yaacoub.entities.Auteur] for value 'nom'; nested exception is java.lang.IllegalArgumentException: Cannot resolve URI nom. Is it local or remote? Only local URIs are resolvable. (through reference chain: com.yaacoub.entities.Pfe["auteurs"]->java.util.LinkedHashSet[1])
    at org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.readJavaType(AbstractJackson2HttpMessageConverter.java:245) ~[spring-web-5.2.3.RELEASE.jar:5.2.3.RELEASE]
    at org.spcom.fasterxml.jackson.databind.deser.std.CollectionDeserializer.deserialize(CollectionDeserializer.java:286) ~[jackson-databind-2.10.2.jar:2.10.2]
    ... 62 common frames omitted
Caused by: java.lang.IllegalArgumentException: Cannot resolve URI nom. Is it local or remote? Only local URIs are resolvable.
    ... 65 common frames omitted