java.lang.NullPointerException: Cannot invoke "dev.morphia.mapping.codec.pojo.EntityModel.getType()" because "this.root" is null

[lynns1009]

Hi, team
I have an Entity

@Getter
@Setter
@Entity(value = "roomupgrade",noClassnameStored = true)
public class RoomUpgrade {

    @Id
    @Property("id")
    private String reservationId;
    private int hotelId;
    private String upgradeStatus;
    private long upgradeTime;
    private long itineraryId;
    private String brand;

    public RoomUpgrade() {
        super();
    }

    public RoomUpgrade(String reservationId, int hotelId, String upgradeStatus,long upgradeTime, long itineraryId,
                       String brand) {
        this.reservationId = reservationId;
        this.hotelId = hotelId;
        this.upgradeStatus = upgradeStatus;
        this.upgradeTime = upgradeTime;
        this.itineraryId = itineraryId;
        this.brand = brand;
    }
}

Then when run project, I got this error
java.lang.NullPointerException: Cannot invoke "dev.morphia.mapping.codec.pojo.EntityModel.getType()" because "this.root" is null
at dev.morphia.internal.PathTarget.failValidation(PathTarget.java:137) ~[morphia-core-2.2.1.jar:?]
at dev.morphia.internal.PathTarget.resolve(PathTarget.java:166) ~[morphia-core-2.2.1.jar:?]
at dev.morphia.internal.PathTarget.translatedPath(PathTarget.java:106) ~[morphia-core-2.2.1.jar:?]
at dev.morphia.query.experimental.filters.Filter.path(Filter.java:156) ~[morphia-core-2.2.1.jar:?]
at dev.morphia.query.experimental.filters.Filter.encode(Filter.java:60) ~[morphia-core-2.2.1.jar:?]
at dev.morphia.query.MorphiaQuery.lambda$getQueryDocument$2(MorphiaQuery.java:337) ~[morphia-core-2.2.1.jar:?]
at dev.morphia.aggregation.experimental.codecs.ExpressionHelper.document(ExpressionHelper.java:36) ~[morphia-core-2.2.1.jar:?]
at dev.morphia.query.MorphiaQuery.getQueryDocument(MorphiaQuery.java:334) ~[morphia-core-2.2.1.jar:?]
at dev.morphia.query.MorphiaQuery.toDocument(MorphiaQuery.java:242) ~[morphia-core-2.2.1.jar:?]
at dev.morphia.query.MorphiaQuery.iterable(MorphiaQuery.java:291) ~[morphia-core-2.2.1.jar:?]
at dev.morphia.query.MorphiaQuery.prepareCursor(MorphiaQuery.java:320) ~[morphia-core-2.2.1.jar:?]
at dev.morphia.query.MorphiaQuery.iterator(MorphiaQuery.java:200) ~[morphia-core-2.2.1.jar:?]
at dev.morphia.query.Query.iterator(Query.java:262) ~[morphia-core-2.2.1.jar:?]

By looking into more details, it seems caused by
java.lang.NullPointerException: Cannot invoke "com.mongodb.client.MongoCollection.find(org.bson.conversions.Bson)" because "updated" is null
at dev.morphia.query.MorphiaQuery.iterable(MorphiaQuery.java:308) ~[morphia-core-2.2.1.jar:?]
at dev.morphia.query.MorphiaQuery.prepareCursor(MorphiaQuery.java:320) ~[morphia-core-2.2.1.jar:?]
at dev.morphia.query.MorphiaQuery.iterator(MorphiaQuery.java:200) ~[morphia-core-2.2.1.jar:?]
at dev.morphia.query.Query.iterator(Query.java:262) ~[morphia-core-2.2.1.jar:?]

Can I ask some helps?