How to reference entity from different catalog?

Question

I created the following table within the catalog "data" that requires to reference an entity called "UserAccount" in a different catalog namely, "useraccount". So I write:

@Entity
@Table(name = "data", catalog = "data")
public class Data implements Serializable
{
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;

@Column(nullable = false, unique = true)
private String name;

@ManyToOne(targetEntity = UserAccount.class)
@PrimaryKeyJoinColumn
private UserAccount user;
....//
}

But using "targetEntity" parameter seems not working since I get the following error:

@OneToOne or @ManyToOne on [cut].Data.user references an unknown entity: [cut].user.UserAccount

Hence, the reference is not right. How to correctly refer to entities from another catalog?

Edit. For catalog I mean Database schema:

Edit: One of the configuration file

@Configuration
@EnableTransactionManagement
@EnableJpaRepositories(
    entityManagerFactoryRef = "userEntityManager",
    transactionManagerRef = "userTransactionManager",
    basePackages = {"it.unict.spring.platform.persistence.repository.user"}
    )
public class JpaTransactUser
{

@Bean(name = "userEntityManager")   
public LocalContainerEntityManagerFactoryBean getServersEntityManager(
                EntityManagerFactoryBuilder builder,
                @Qualifier("userSource") DataSource serversDataSource){
    return builder
            .dataSource(serversDataSource)
            .packages("it.unict.spring.platform.persistence.model.user")
            .persistenceUnit("userUnit")
            .properties(additionalJpaProperties())
            .build();

}

Map<String,?> additionalJpaProperties()
{
    Map<String,String> map = new HashMap<>();

    map.put("hibernate.hbm2ddl.auto", "update");        
    //map.put("hibernate.dialect", "org.hibernate.dialect.MySQLDialect");
    map.put("hibernate.show_sql", "true");
    return map;
}


@Bean("userDataSourceProperties")    
@ConfigurationProperties("app.datasource.user")
public DataSourceProperties dataDataSourceProperties()
{
    return new DataSourceProperties();
}


@Bean("userSource")    
@ConfigurationProperties("app.datasource.user")
public DataSource getDataSource(@Qualifier("userDataSourceProperties") DataSourceProperties dataDataSourceProperties) {
    return dataDataSourceProperties().initializeDataSourceBuilder().build();
}

@Bean(name = "userTransactionManager")
public JpaTransactionManager transactionManager(@Qualifier("userEntityManager") EntityManagerFactory serversEntityManager)
{
    JpaTransactionManager transactionManager = new JpaTransactionManager();
    transactionManager.setEntityManagerFactory(serversEntityManager);
    return transactionManager;
}

}