I/REALM_SYNC: Connection[2]: Session[2]: Received: ERROR(error_code=225, message_size=126, try_again=0)

//Schemas

public class device extends RealmObject {
    @PrimaryKey
    private ObjectId _id;
    private Integer __v;
    private Boolean byBluetooth;
    private Date createdAt;
    private String id;
    private String model;
    private String name;
    private device_preferences preferences;
    private Integer status;
    private Integer type;
    private Date updatedAt;
    private ObjectId userId;
    private String userPId;
}

    @RealmClass(embedded = true)
    public class device_preferences extends RealmObject {
        private Integer highAlarmLimit;
        private Integer highDiastolicLimit;
        private Integer highDiastolicLimitAlarm;
        private Integer highHeartRate;
        private Integer highHeartRateAlarm;
        private Integer highLimit;
        private Integer highSystolicLimit;
        private Integer highSystolicLimitAlarm;
        private Double lowAlarmLimit;
        private Integer lowDiastolicLimit;
        private Integer lowDiastolicLimitAlarm;
        private Integer lowHeartRate;
        private Integer lowHeartRateAlarm;
        private Integer lowLimit;
        private Integer lowSystolicLimit;
        private Integer lowSystolicLimitAlarm;
        private Integer unit;
}