Android. Библиотека Room

Работаю с базой данных с помощью библиотеки Room, создал две таблицы и реализовал CRUD методы. Но при получении элемента по идентификатору из таблицы Questions всегда возвращается null, но в ней хранятся элементы. А с таблицей Tickets все в порядке. Не знаете в чем может быть проблема и как ее решить ?

Таб. билеты:

import androidx.room.ColumnInfo;
import androidx.room.Entity;
import androidx.room.Ignore;
import androidx.room.PrimaryKey;

@Entity(tableName = "tickets")
public class Ticket {
    @PrimaryKey(autoGenerate = true)
    @ColumnInfo(name = "ticket_id")
    private long id;

    @ColumnInfo(name = "ticket_status")
    private String status;


    @Ignore
    public Ticket() {
    }

    public Ticket(long id, String status) {
        this.id = id;
        this.status = status;
    }

    public long getId() {
        return id;
    }

    public void setId(long id) {
        this.id = id;
    }

    public String getStatus() {
        return status;
    }

    public void setStatus(String status) {
        this.status = status;
    }
}

Таб. вопросы:

Entity(tableName = "questions")
public class Question {
    @PrimaryKey(autoGenerate = true)
    @ColumnInfo(name = "question_id")
    private long id;

    @ColumnInfo(name = "number_ticket")
    private String number_ticke;

    @ColumnInfo(name = "question_text")
    private String question;

    @ColumnInfo(name = "question_status")
    private String status;

    @ColumnInfo(name = "question_answer")
    private String answer;

    @Ignore
    public Question(){

    }


    public Question(long id, String number_ticke, String question, String status, String answer) {
        this.id = id;
        this.number_ticke = number_ticke;
        this.question = question;
        this.status = status;
        this.answer = answer;
    }

    public long getId() {
        return id;
    }

    public void setId(long id) {
        this.id = id;
    }

    public String getNumber_ticke() {
        return number_ticke;
    }

    public void setNumber_ticke(String number_ticke) {
        this.number_ticke = number_ticke;
    }

    public String getQuestion() {
        return question;
    }

    public void setQuestion(String question) {
        this.question = question;
    }

    public String getStatus() {
        return status;
    }

    public void setStatus(String status) {
        this.status = status;
    }

    public String getAnswer() {
        return answer;
    }

    public void setAnswer(String answer) {
        this.answer = answer;
    }
}

DAO Ticket:

import androidx.room.Dao;
import androidx.room.Delete;
import androidx.room.Insert;
import androidx.room.Query;
import androidx.room.Update;

import com.example.examenatorproject.Model.Ticket;

import java.util.List;
@Dao
public interface TicketDAO {
    @Insert
    public long addTicket(Ticket ticket);

    @Update
    public void updateTicket(Ticket ticket);

    @Delete()
    public void deleteTicket(Ticket ticket);

    @Query("select * from tickets")
    public List<Ticket> getAllTickets();

    @Query("select * from tickets where ticket_id ==:ticketId ")
    public Ticket getTicket(long ticketId);
}

DAO Question:

import androidx.room.Dao;
import androidx.room.Delete;
import androidx.room.Insert;
import androidx.room.Query;
import androidx.room.Update;

import com.example.examenatorproject.Model.Question;
import com.example.examenatorproject.Model.Ticket;


import java.util.List;
@Dao
public interface QuestionDAO {
    @Insert
    public long addQuestion(Question question);

    @Update
    public void updateQuestion(Question question);

    @Delete()
    public void deleteQuestion(Question question);

    @Query("select * from questions")
    public List<Question> getAllQuestions();

    @Query("select * from questions where question_id ==:questionId ")
    public Question getQuestion(long questionId);

}

Фрагмент кода:

 Question q = Utils.questionAppDatabase.getQuestionDAO().getQuestion(iid);
 Ticket t = Utils.ticketAppDatabase.getTicketDAO().getTicket(iid);