Datanucleus Google App Engine OneToMany ralathionship
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I've got following code:

    @Entity
public class Incident {

	@Id
	@GeneratedValue(strategy = GenerationType.IDENTITY)
    @Extension(vendorName="datanucleus", key="gae.encoded-pk", value="true")
	private String incidentId;

	@Persistent
    @Extension(vendorName="datanucleus", key="gae.pk-id", value="true")
    private Long keyId;
    

    @OneToMany(mappedBy="incident")
    @OrderBy("requestId")
    @JoinColumn(name="INCIDENT_ID")
    public List<ServiceRequest> requests;
...
}

@Entity
public class ServiceRequest {
	
	@Id
	@GeneratedValue(strategy = GenerationType.IDENTITY)
    @Extension(vendorName="datanucleus", key="gae.encoded-pk", value="true")
    private String requestId;

    @Persistent
    @Extension(vendorName="datanucleus", key="gae.pk-id", value="true")
    private Long keyId;
    private Incident incident;
...
}


    
Scenario of using it is firstly create and persist ServiceRequest and then create a Incident and add to it existing ServiceRequest - but when I tried to persist an Incident I've got following error
Caused by: org.datanucleus.exceptions.NucleusUserException: Object with id "agxzbWFydGNpdHlhZ2hyFAsSDlNlcnZpY2VSZXF1ZXN0GAEM" is managed by a different Object Manager


