Setting new helper class while using multiple helper classes in OpenHelperManager ORMLite android

I am using ORMLite framework on an android project and I am stuck while using OpenHelperManager.getHelper() on multiple repo classes.

Here is a brief of my code structure :-

DatabaseHelper class which is responsible for creating database and tables

public class DatabaseHelper extends OrmLiteSqliteOpenHelper{

    public static String DATABASE_NAME = "muffet.db";
    public static int DATABASE_VERSION = 5;

    public DatabaseHelper(Context context) {
        super(context, DATABASE_NAME, null, DATABASE_VERSION, R.raw.ormlite_config);
    }

    @Override
    public void onCreate(SQLiteDatabase database, ConnectionSource connectionSource) {
        // Creating tables
        try {
            TableUtils.createTable(connectionSource, Category.class);
            TableUtils.createTable(connectionSource, Transaction.class);
            TableUtils.createTable(connectionSource, Budget.class);
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }

    @Override
    public void onUpgrade(SQLiteDatabase database, ConnectionSource connectionSource, int oldVersion, int newVersion) {
        try {
            TableUtils.dropTable(connectionSource, Category.class, true);
            TableUtils.dropTable(connectionSource, Transaction.class, true);
            TableUtils.dropTable(connectionSource, Budget.class, true);
            onCreate(database, connectionSource);
        } catch (SQLException e) {
            e.printStackTrace();
        }

    }

}

TransactionRepo which is responsible for accessing database.

public class TransactionRepo extends DatabaseHelper {
    //    private Dao<Transaction, Integer> transactionDao = null;
    private RuntimeExceptionDao<Transaction, Integer> transactionRuntimeDao = null;

    public TransactionRepo(Context context) {
        super(context);
    }

    public RuntimeExceptionDao<Transaction, Integer> getTransactionRuntimeDao(){
        if(transactionRuntimeDao == null){
            transactionRuntimeDao = getRuntimeExceptionDao(Transaction.class);
        }
        return transactionRuntimeDao;
    }

    /**
     * Save Transaction to database
     */
    public void save(Transaction transaction){
        try {
            transactionRuntimeDao = getTransactionRuntimeDao();
            transactionRuntimeDao.createOrUpdate(transaction);
        }catch(Exception e){
            e.printStackTrace();
        }

    }

    /**
     * Get all list of data
     */
    public List<Transaction> getAll(){
        try{
            transactionRuntimeDao = getTransactionRuntimeDao();
            return transactionRuntimeDao.queryForAll();
        }catch (Exception e){
            e.printStackTrace();
            return null;
        }
    }
}

TransactionServiceImpl which is a service class for getting data from the TransactionRepo

public class TransactionServiceImpl implements TransactionService {

    TransactionRepo transactionRepo;

    @Override
    public void save(Transaction transaction, Activity activity) {


        transactionRepo = OpenHelperManager.getHelper(activity, TransactionRepo.class);
        transactionRepo.save(transaction);
        OpenHelperManager.releaseHelper();
    }

    @Override
    public List<Transaction> getAll(Activity activity) {

        transactionRepo = OpenHelperManager.getHelper(activity, TransactionRepo.class);

        List<Transaction> transactionList = transactionRepo.getAll();

        OpenHelperManager.releaseHelper();

        return transactionList;
    }
}

It works fine when I run it. But when I try to access some another repository class which extends DatabaseHelper , and use the OpenHelperManager.getHelper() like for example :-

CategoryRepo categoryRepo = OpenHelperManager.getHelper(activity, CategoryRepo.class);

I get error as java.lang.IllegalStateException: Helper class was class com.muffet.persistence.repository.TransactionRepo but is trying to be reset to class com.muffet.persistence.repository.CategoryRepo

This clearly means that the OpenHelperManager has saved instance of TransactionRepo and when I try to get and set it as CategoryRepo it is unable to cast or something like that.

How can I solve this issue?

Thank you