Mockito not mocking simple class

I use moсkito in my application for unit testing Here is the class which mockito not mocking :

@Parcel(implementations = {TrainingRealmProxy.class},
        value = Parcel.Serialization.BEAN,
        analyze = Training.class)

public class Training extends RealmObject {

@PrimaryKey
private int id;

private Date trainingDate;
private int trainingDurationSeconds;

private boolean finished;

private RealmList<Exercise> exerciseList;

public Training(Date trainingDate, int trainingDurationSeconds) {
    this.trainingDurationSeconds = trainingDurationSeconds;
    this.trainingDate = trainingDate;
    finished = false;
}

public Training(Date trainingDate, RealmList<Exercise> exerciseList) {
    this.trainingDate = trainingDate;
    this.exerciseList = exerciseList;
    finished = false;
}


public Training() {
    finished = false;
}

@ParcelProperty("exerciseList")
@ParcelPropertyConverter(TrainingListParcelConverter.class)
public void setExerciseList(List<Exercise> exerciseList) {
    this.exerciseList = convertListToRealmList(exerciseList);
}

....

Code where im trying to mock this class :

Training training = mock(Training.class);

And error that is thrown after trying:

org.mockito.exceptions.base.MockitoException: 
Mockito cannot mock this class: class com.gangstagym.model.models.Training.
Mockito can only mock non-private & non-final classes.

I did not find similar questions and I have no idea why this error is thrown out.