Using Hibernate with annotations version: 3.2.1

I have a Customer object which has an association to an AccountManager object. Problem is that the value in the join column in Customer may not exist in the AccountManager table (no the value isn't null unfortunately). My question is how can I tell hibernate to select the Customer even if the AccountManager doesn't exist? Here is more info:

@Entity
@Table(name="customers")
public class Customer {

private AccountManager acctMgr;

@OneToOne
@JoinColumn(name="acct_mgr_id", referencedColumnName="user_id")
public AccountManager getAcctMgr() { ... }
public void setAcctMgr() { ... }

...
}
--
@Entity
@Table(name="users")
public class AccountManager {
private long userId;

@Column(name="user_id")
public long getUserId() { ... }
...
}

For example, if the acct_mgr_id is 0 (no acct mgr yet) I get the following error:
"No row with the given identifier exists"

I realize this isn't optimal db design at work here (I know how to get it to work with nulls), but I have to work with a legacy system. Is there any way to do what I want? Maybe specify some hql that says if acct_mgr_id is 0 then return null for this association?

Thanks in advance :)

try @NotFound(IGNORE)

Thanks! This worked.

@NotFound(action=NotFoundAction.IGNORE)