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                                                    <th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Issue Type:</th> 
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                                                    <th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Affects Versions:</th> 
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                                                    <th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Assignee:</th> 
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                                                    <th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Components:</th> 
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                                                    <th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Created:</th> 
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                                                    <th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Priority:</th> 
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                                                    <th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Reporter:</th> 
                                                    <td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <a class="user-hover" rel="christian.beikov" style="color:#6c797f;; color: #3b73af; text-decoration: none" id="email_christian.beikov" href="https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%3A0222998d-a0c8-4789-91ec-6a92d10dfb9a"> Christian Beikov </a> </td> 
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                                                    <td class="text-paragraph-pattern-container mobile-resize-text " style="padding: 0; border-collapse: collapse; padding: 0 0 10px"> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0; margin-top: 0">Mapping a `@ManyToMany` association doesn't work when using non-primary key columns like in the following</p> 
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                                                                <pre class="code-java" style="margin: 10px 0 0; margin-top: 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
@Entity
@Table(name = <span class="code-quote" style="color: #009100">"animal"</span>)
<span class="code-keyword" style="color: #000091">public</span> <span class="code-keyword" style="color: #000091">class </span>Animal <span class="code-keyword" style="color: #000091">implements</span> Serializable {

    @Id
    @Column(name = <span class="code-quote" style="color: #009100">"id"</span>)
    @GeneratedValue(strategy = GenerationType.AUTO)
    <span class="code-keyword" style="color: #000091">private</span> <span class="code-object" style="color: #910091">Integer</span> id;
    @Column(name = <span class="code-quote" style="color: #009100">"name"</span>, nullable = <span class="code-keyword" style="color: #000091">false</span>, unique = <span class="code-keyword" style="color: #000091">true</span>)
    <span class="code-keyword" style="color: #000091">private</span> <span class="code-object" style="color: #910091">String</span> name;

    @Column(name = <span class="code-quote" style="color: #009100">"ukey"</span>, unique = <span class="code-keyword" style="color: #000091">true</span>)
    <span class="code-keyword" style="color: #000091">private</span> <span class="code-object" style="color: #910091">String</span> key;
    
    @ManyToMany
    @JoinTable(
            name = <span class="code-quote" style="color: #009100">"relatives"</span>,
            joinColumns = @JoinColumn(name = <span class="code-quote" style="color: #009100">"ukey1"</span>, referencedColumnName = <span class="code-quote" style="color: #009100">"ukey"</span>),
            inverseJoinColumns = @JoinColumn(name = <span class="code-quote" style="color: #009100">"ukey2"</span>, referencedColumnName = <span class="code-quote" style="color: #009100">"ukey"</span>)
    )
    <span class="code-keyword" style="color: #000091">private</span> Set&lt;Animal&gt; relatives;
}
</pre> 
                                                            </div>
                                                        </div> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">It fails with <tt>Duplicate property mapping of _org_hibernate_model_Animal_relatives found in org.hibernate.model.Animal</tt>. I debugged a little and it seems two synthetic properties with the same name are created. Maybe the synthetic property generation fails to see that source and target are the same so it doesn't have to generate two synthetic properties?</p> </td> 
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