Problem with persisting relationship

I have 2 entities, the SubModel that has a list of possible options. I made a unidirectional OneToMany relation, when I do any persistence in the SubModel entity that the list of Options is empty Hibernate does quietly, but without having to include / edit the relationship of it with the Options therein the error occurs.   The way I did this relationship is wrong?

@Entity
public class SubModelo  implements Serializable {
@Id
@GeneratedValue(strategy=GenerationType.AUTO)
private Integer id;
@Column
@Size(max=30)
private String nome;
@NotNull
@Size (max=1)
private String portas;
@NotNull
@Size (max=9)
private String motor;
@NotNull
@Enumerated
private Combustivel comb;
@NotNull
private boolean automatico;
@OneToMany(cascade=CascadeType.ALL, fetch=FetchType.EAGER)
@JoinTable(name="SUBMODELO_TEM_OPCS", joinColumns={@JoinColumn(name="SUBMODELO_ID", referencedColumnName="id")}, inverseJoinColumns={@JoinColumn(name="OPCIONAL_ID", referencedColumnName="id")})
private List<Opcional> opc;

The Optional entity:

  

@Entity   public class Optional implements Serializable {   private static final long serialVersionUID = 3L;
   Id    @GeneratedValue (strategy = GenerationType.AUTO)   private Integer id;    @Column    @Size (max = 35)    @NotNull (message="Optional Name Must Be Reported!")   private String name;    @Column    @Size (max = 150)    @NotNull (message="Detailed Description Should Be Reported!")   private String description;    @Column (length = 1)    @NotNull   private String level;    @Column (length = 3)   private String icon;

The error:

23:55:03,875 ERROR [org.jboss.as.ejb3.invocation] (default task-2) WFLYEJB0034: EJB Invocation failed on component SubModeloService for method public br.com.ozelo.entidades.SubModelo br.com.ozelo.servico.SubModeloService.novoSubModelo(br.com.ozelo.entidades.SubModelo): javax.ejb.EJBException: javax.persistence.PersistenceException: org.hibernate.property.access.spi.PropertyAccessException: Error accessing field [private java.lang.Integer br.com.ozelo.entidades.Opcional.id] by reflection for persistent property [br.com.ozelo.entidades.Opcional#id] : ABS
    at org.jboss.as.ejb3.tx.CMTTxInterceptor.handleExceptionInOurTx(CMTTxInterceptor.java:187)
    at org.jboss.as.ejb3.tx.CMTTxInterceptor.invokeInOurTx(CMTTxInterceptor.java:277)
    at org.jboss.as.ejb3.tx.CMTTxInterceptor.required(CMTTxInterceptor.java:327)
    at org.jboss.as.ejb3.tx.CMTTxInterceptor.processInvocation(CMTTxInterceptor.java:239)
    at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
    at org.jboss.as.ejb3.component.interceptors.CurrentInvocationContextInterceptor.processInvocation(CurrentInvocationContextInterceptor.java:41)
    at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
    at org.jboss.as.ejb3.component.invocationmetrics.WaitTimeInterceptor.processInvocation(WaitTimeInterceptor.java:47)
    at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
    at org.jboss.as.ejb3.security.SecurityContextInterceptor.processInvocation(SecurityContextInterceptor.java:100)
    at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
    at org.jboss.as.ejb3.deployment.processors.StartupAwaitInterceptor.processInvocation(StartupAwaitInterceptor.java:22)
    at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
    at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:104)
    at io.undertow.server.Connectors.executeRootHandler(Connectors.java:202)
    at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:805)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)
Caused by: javax.persistence.PersistenceException: org.hibernate.property.access.spi.PropertyAccessException: Error accessing field [private java.lang.Integer br.com.ozelo.entidades.Opcional.id] by reflection for persistent property [br.com.ozelo.entidades.Opcional#id] : ABS
    at org.hibernate.jpa.spi.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1692)
    at org.hibernate.jpa.spi.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1602)
    at org.hibernate.jpa.spi.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1608)
    at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
    at org.jboss.as.ejb3.component.pool.PooledInstanceInterceptor.processInvocation(PooledInstanceInterceptor.java:51)
    at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
    at org.jboss.as.ejb3.tx.CMTTxInterceptor.invokeInOurTx(CMTTxInterceptor.java:275)
    ... 103 more