I would like to map an object to (exactly) two instances of another object type. However, I receive this error:

Repeated column in mapping for entity: ProfileBean column: workspaceNodeId (should be mapped with insert="false" update="false")

Is it possible to map this type of relationship in Hibernate (JPA) without resorting to a Collection?

This specifically is what I would like to do:

I have a simple user profile object and a tree data structure built of nodes. The user profile needs handles to two nodes in that tree: The root node of the tree hierarchy and another arbitrary node in the tree (the home node). Here's the snippet of code.

...

public class ProfileBean implements Profile {

...

@ManyToOne(optional = true, fetch = FetchType.LAZY, targetEntity = WorkspaceNodeBean.class)
@JoinColumn(name = "workspaceNodeId")
private WorkspaceNode rootNode;

@ManyToOne(optional = true, fetch = FetchType.LAZY, targetEntity = WorkspaceNodeBean.class)
@JoinColumn(name = "workspaceNodeId")
private WorkspaceNode homeNode;

...

}

As a follow-up:

The error disappears if the @JoinColumn annotations are removed. (They are unnecessary, because they refer to the target object's primary key field.) I have not actually tested that the code runs properly, but the environment starts cleanly.

Is this a bug (or limitation) of how @JoinColumn operates?

This is my configuration:
16:26:12,103 INFO [Version] Hibernate Annotations 3.3.0.GA
16:26:12,117 INFO [Environment] Hibernate 3.2.4.sp1
16:26:12,123 INFO [Environment] Bytecode provider name : cglib
16:26:12,221 INFO [Version] Hibernate EntityManager 3.3.1.GA