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                                &nbsp;
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                                        <td class="page-title-pattern-first-line " style="padding: 0px; border-collapse: collapse; font-family: Arial, sans-serif; font-size: 14px; padding-top: 10px"> <a href="https://hibernate.atlassian.net/browse/HHH" style="color: #3b73af; text-decoration: none">Hibernate ORM</a> / <a href="https://hibernate.atlassian.net/browse/HHH-8994" style="color: #3b73af; text-decoration: none"><img src="cid:jira-generated-image-static-bug-b9fce6b7-eeca-4611-9c01-8ac8e5184f20" height="16" width="16" border="0" align="absmiddle" alt="Bug" style="vertical-align: text-bottom" /></a> <a href="https://hibernate.atlassian.net/browse/HHH-8994" style="color: #3b73af; text-decoration: none">HHH-8994</a> 
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                                        <td style="vertical-align: top;; padding: 0px; border-collapse: collapse; padding-right: 5px; font-size: 20px; line-height: 30px; mso-line-height-rule: exactly" class="page-title-pattern-header-container"> <span class="page-title-pattern-header" style="font-family: Arial, sans-serif; padding: 0; font-size: 20px; line-height: 30px; mso-text-raise: 2px; mso-line-height-rule: exactly; vertical-align: middle"> <a href="https://hibernate.atlassian.net/browse/HHH-8994" style="color: #3b73af; text-decoration: none">QueryException during startup with composite key in ElementCollection</a> </span> 
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                                            Issue Type:
                                        </th> 
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                                            Affects Versions:
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                                             4.3.1 
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                                            Assignee:
                                        </th> 
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                                             Unassigned 
                                        </td> 
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                                            Components:
                                        </th> 
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                                             entity-manager 
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                                            Created:
                                        </th> 
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                                             22/Feb/14 9:11 AM 
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                                            Environment:
                                        </th> 
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                                             Hibernate 4.3.1.Final, MySQL 5.6.13, Spring 4.0.1.RELEASE 
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                                            Labels:
                                        </th> 
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                                             jpa21 metamodel 
                                        </td> 
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                                            Priority:
                                        </th> 
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                                        </td> 
                                    </tr> 
                                    <tr> 
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                                            Reporter:
                                        </th> 
                                        <td style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <a class="user-hover" rel="cmrudolph" id="email_cmrudolph" href="https://hibernate.atlassian.net/secure/ViewProfile.jspa?name=cmrudolph" style="color:#6c797f;; color: #3b73af; text-decoration: none">Christian Rudolph</a> 
                                        </td> 
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                        <tr> 
                            <td class="email-content-main mobile-expand  issue-description-container" style="padding: 0px; border-collapse: collapse; border-left: 1px solid #ccc; border-right: 1px solid #ccc; border-top: 0; border-bottom: 0; padding: 0 15px 0 16px; background-color: #fff; padding-top: 5px; padding-bottom: 10px"> 
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                                            <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">Persisting an entity with an <tt>@ElementCollection</tt> that is a map with a composite key fails. A <tt>QueryException</tt> gets thrown during initialization of hibernate.</p> 
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                                                    <b>stack trace</b>
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                                                    <pre style="margin: 10px 0 0 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal; white-space: pre; word-break: normal; word-wrap: break-word; word-break: break-word; white-space: pre-wrap">Caused by: org.hibernate.QueryException: could not resolve property: key1 of: component[val1,val2]
    at org.hibernate.persister.entity.AbstractPropertyMapping.propertyException(AbstractPropertyMapping.java:83) ~[AbstractPropertyMapping.class:4.3.1.Final]
    at org.hibernate.persister.entity.AbstractPropertyMapping.toColumns(AbstractPropertyMapping.java:98) ~[AbstractPropertyMapping.class:4.3.1.Final]
    at org.hibernate.persister.collection.AbstractCollectionPersister.toColumns(AbstractCollectionPersister.java:1625) ~[AbstractCollectionPersister.class:4.3.1.Final]
    at org.hibernate.loader.plan.build.internal.spaces.CompositePropertyMapping.toColumns(CompositePropertyMapping.java:124) ~[CompositePropertyMapping.class:4.3.1.Final]
    at org.hibernate.loader.plan.build.internal.spaces.CompositeQuerySpaceImpl.toAliasedColumns(CompositeQuerySpaceImpl.java:52) ~[CompositeQuerySpaceImpl.class:4.3.1.Final]
    at org.hibernate.loader.plan.build.internal.spaces.JoinImpl.resolveAliasedLeftHandSideJoinConditionColumns(JoinImpl.java:79) ~[JoinImpl.class:4.3.1.Final]
    at org.hibernate.loader.plan.exec.internal.LoadQueryJoinAndFetchProcessor.addJoins(LoadQueryJoinAndFetchProcessor.java:261) ~[LoadQueryJoinAndFetchProcessor.class:4.3.1.Final]
    at org.hibernate.loader.plan.exec.internal.LoadQueryJoinAndFetchProcessor.renderEntityJoin(LoadQueryJoinAndFetchProcessor.java:193) ~[LoadQueryJoinAndFetchProcessor.class:4.3.1.Final]
    at org.hibernate.loader.plan.exec.internal.LoadQueryJoinAndFetchProcessor.renderJoin(LoadQueryJoinAndFetchProcessor.java:158) ~[LoadQueryJoinAndFetchProcessor.class:4.3.1.Final]
    at org.hibernate.loader.plan.exec.internal.LoadQueryJoinAndFetchProcessor.processQuerySpaceJoin(LoadQueryJoinAndFetchProcessor.java:137) ~[LoadQueryJoinAndFetchProcessor.class:4.3.1.Final]
    at org.hibernate.loader.plan.exec.internal.LoadQueryJoinAndFetchProcessor.processQuerySpaceJoins(LoadQueryJoinAndFetchProcessor.java:132) ~[LoadQueryJoinAndFetchProcessor.class:4.3.1.Final]
    at org.hibernate.loader.plan.exec.internal.LoadQueryJoinAndFetchProcessor.processQuerySpaceJoin(LoadQueryJoinAndFetchProcessor.java:138) ~[LoadQueryJoinAndFetchProcessor.class:4.3.1.Final]
    at org.hibernate.loader.plan.exec.internal.LoadQueryJoinAndFetchProcessor.processQuerySpaceJoins(LoadQueryJoinAndFetchProcessor.java:132) ~[LoadQueryJoinAndFetchProcessor.class:4.3.1.Final]
    at org.hibernate.loader.plan.exec.internal.LoadQueryJoinAndFetchProcessor.processQuerySpaceJoins(LoadQueryJoinAndFetchProcessor.java:113) ~[LoadQueryJoinAndFetchProcessor.class:4.3.1.Final]
    at org.hibernate.loader.plan.exec.internal.AbstractLoadQueryDetails.generate(AbstractLoadQueryDetails.java:171) ~[AbstractLoadQueryDetails.class:4.3.1.Final]
    at org.hibernate.loader.plan.exec.internal.BasicCollectionLoadQueryDetails.&lt;init&gt;(BasicCollectionLoadQueryDetails.java:60) ~[BasicCollectionLoadQueryDetails.class:4.3.1.Final]
    at org.hibernate.loader.plan.exec.internal.BatchingLoadQueryDetailsFactory.makeCollectionLoadQueryDetails(BatchingLoadQueryDetailsFactory.java:101) ~[BatchingLoadQueryDetailsFactory.class:4.3.1.Final]
    at org.hibernate.loader.collection.plan.AbstractLoadPlanBasedCollectionInitializer.&lt;init&gt;(AbstractLoadPlanBasedCollectionInitializer.java:77) ~[AbstractLoadPlanBasedCollectionInitializer.class:4.3.1.Final]
    at org.hibernate.loader.collection.plan.CollectionLoader.&lt;init&gt;(CollectionLoader.java:112) ~[CollectionLoader.class:4.3.1.Final]
    at org.hibernate.loader.collection.plan.CollectionLoader$Builder.byKey(CollectionLoader.java:105) ~[CollectionLoader$Builder.class:4.3.1.Final]
    at org.hibernate.loader.collection.plan.AbstractBatchingCollectionInitializerBuilder.buildNonBatchingLoader(AbstractBatchingCollectionInitializerBuilder.java:45) ~[AbstractBatchingCollectionInitializerBuilder.class:4.3.1.Final]
    at org.hibernate.loader.collection.BatchingCollectionInitializerBuilder.createBatchingCollectionInitializer(BatchingCollectionInitializerBuilder.java:71) ~[BatchingCollectionInitializerBuilder.class:4.3.1.Final]
    at org.hibernate.persister.collection.BasicCollectionPersister.createCollectionInitializer(BasicCollectionPersister.java:343) ~[BasicCollectionPersister.class:4.3.1.Final]
    at org.hibernate.persister.collection.AbstractCollectionPersister.postInstantiate(AbstractCollectionPersister.java:676) ~[AbstractCollectionPersister.class:4.3.1.Final]
    at org.hibernate.internal.SessionFactoryImpl.&lt;init&gt;(SessionFactoryImpl.java:484) ~[SessionFactoryImpl.class:4.3.1.Final]
    at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1857) ~[Configuration.class:4.3.1.Final]
    at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl$4.perform(EntityManagerFactoryBuilderImpl.java:850) ~[EntityManagerFactoryBuilderImpl$4.class:4.3.1.Final]
    at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl$4.perform(EntityManagerFactoryBuilderImpl.java:843) ~[EntityManagerFactoryBuilderImpl$4.class:4.3.1.Final]
    at org.hibernate.boot.registry.classloading.internal.ClassLoaderServiceImpl.withTccl(ClassLoaderServiceImpl.java:399) ~[ClassLoaderServiceImpl.class:4.3.1.Final]
    at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:842) ~[EntityManagerFactoryBuilderImpl.class:4.3.1.Final]
    at org.hibernate.jpa.HibernatePersistenceProvider.createContainerEntityManagerFactory(HibernatePersistenceProvider.java:150) ~[HibernatePersistenceProvider.class:4.3.1.Final]
    at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:336) ~[LocalContainerEntityManagerFactoryBean.class:4.0.1.RELEASE]
    at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:318) ~[AbstractEntityManagerFactoryBean.class:4.0.1.RELEASE]
    ...</pre> 
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                                            <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">Simple test setup follows:</p> 
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                                                <div class="codeHeader panelHeader" style="border-bottom-width: 1px;; border-bottom: 1px solid #ccc; padding: 9px 12px">
                                                    <b>MyEntity.java</b>
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                                                    <pre class="code-java" style="margin: 10px 0 0 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal"><span class="code-keyword" style="color: #000091">import</span> javax.persistence.*;
<span class="code-keyword" style="color: #000091">import</span> java.util.Map;

@Entity
<span class="code-keyword" style="color: #000091">public</span> class MyEntity {
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    <span class="code-keyword" style="color: #000091">private</span> <span class="code-object" style="color: #910091">Integer</span> id;
    @ElementCollection
    <span class="code-keyword" style="color: #000091">private</span> Map&lt;CompositeKey, CompositeValue&gt; map;

    @Embeddable
    <span class="code-keyword" style="color: #000091">public</span> <span class="code-keyword" style="color: #000091">static</span> class CompositeKey {
        @ManyToOne
        <span class="code-keyword" style="color: #000091">private</span> ReferencedEntity key1;
        @Basic
        <span class="code-keyword" style="color: #000091">private</span> <span class="code-object" style="color: #910091">Integer</span> key2;
    }

    @Embeddable
    <span class="code-keyword" style="color: #000091">public</span> <span class="code-keyword" style="color: #000091">static</span> class CompositeValue {
        @Basic
        <span class="code-keyword" style="color: #000091">private</span> <span class="code-object" style="color: #910091">Integer</span> val1;
        @Basic
        <span class="code-keyword" style="color: #000091">private</span> <span class="code-object" style="color: #910091">Integer</span> val2;
    }
}</pre> 
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                                                    <b>ReferencedEntity.java</b>
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                                                    <pre class="code-java" style="margin: 10px 0 0 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal"><span class="code-keyword" style="color: #000091">import</span> javax.persistence.*;

@Entity
<span class="code-keyword" style="color: #000091">public</span> class ReferencedEntity {
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    <span class="code-keyword" style="color: #000091">private</span> <span class="code-object" style="color: #910091">Integer</span> id;
}</pre> 
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                                            <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">It's strange that hibernate generates the schema correctly, if I rename <tt>MyEntity.CompositeKey.key1</tt> to <tt>val1</tt>.</p> 
                                            <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">If the map referenced an <tt>Integer</tt> instead of <tt>CompositeValue</tt>, the following Exception raises:</p> 
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                                                    <b>stack trace</b>
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                                                    <pre style="margin: 10px 0 0 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal; white-space: pre; word-break: normal; word-wrap: break-word; word-break: break-word; white-space: pre-wrap">Caused by: org.hibernate.QueryException: cannot dereference scalar collection element: key1
        at org.hibernate.persister.collection.ElementPropertyMapping.toColumns(ElementPropertyMapping.java:60) ~[ElementPropertyMapping.class:4.3.1.Final]
        at org.hibernate.persister.collection.AbstractCollectionPersister.toColumns(AbstractCollectionPersister.java:1625) ~[AbstractCollectionPersister.class:4.3.1.Final]
        at org.hibernate.loader.plan.build.internal.spaces.CompositePropertyMapping.toColumns(CompositePropertyMapping.java:124) ~[CompositePropertyMapping.class:4.3.1.Final]
        at org.hibernate.loader.plan.build.internal.spaces.CompositeQuerySpaceImpl.toAliasedColumns(CompositeQuerySpaceImpl.java:52) ~[CompositeQuerySpaceImpl.class:4.3.1.Final]
        at org.hibernate.loader.plan.build.internal.spaces.JoinImpl.resolveAliasedLeftHandSideJoinConditionColumns(JoinImpl.java:79) ~[JoinImpl.class:4.3.1.Final]
        at org.hibernate.loader.plan.exec.internal.LoadQueryJoinAndFetchProcessor.addJoins(LoadQueryJoinAndFetchProcessor.java:261) ~[LoadQueryJoinAndFetchProcessor.class:4.3.1.Final]
        at org.hibernate.loader.plan.exec.internal.LoadQueryJoinAndFetchProcessor.renderEntityJoin(LoadQueryJoinAndFetchProcessor.java:193) ~[LoadQueryJoinAndFetchProcessor.class:4.3.1.Final]
        at org.hibernate.loader.plan.exec.internal.LoadQueryJoinAndFetchProcessor.renderJoin(LoadQueryJoinAndFetchProcessor.java:158) ~[LoadQueryJoinAndFetchProcessor.class:4.3.1.Final]
        at org.hibernate.loader.plan.exec.internal.LoadQueryJoinAndFetchProcessor.processQuerySpaceJoin(LoadQueryJoinAndFetchProcessor.java:137) ~[LoadQueryJoinAndFetchProcessor.class:4.3.1.Final]
        at org.hibernate.loader.plan.exec.internal.LoadQueryJoinAndFetchProcessor.processQuerySpaceJoins(LoadQueryJoinAndFetchProcessor.java:132) ~[LoadQueryJoinAndFetchProcessor.class:4.3.1.Final]
        at org.hibernate.loader.plan.exec.internal.LoadQueryJoinAndFetchProcessor.processQuerySpaceJoin(LoadQueryJoinAndFetchProcessor.java:138) ~[LoadQueryJoinAndFetchProcessor.class:4.3.1.Final]
        at org.hibernate.loader.plan.exec.internal.LoadQueryJoinAndFetchProcessor.processQuerySpaceJoins(LoadQueryJoinAndFetchProcessor.java:132) ~[LoadQueryJoinAndFetchProcessor.class:4.3.1.Final]
        at org.hibernate.loader.plan.exec.internal.LoadQueryJoinAndFetchProcessor.processQuerySpaceJoins(LoadQueryJoinAndFetchProcessor.java:113) ~[LoadQueryJoinAndFetchProcessor.class:4.3.1.Final]
        at org.hibernate.loader.plan.exec.internal.AbstractLoadQueryDetails.generate(AbstractLoadQueryDetails.java:171) ~[AbstractLoadQueryDetails.class:4.3.1.Final]
        at org.hibernate.loader.plan.exec.internal.BasicCollectionLoadQueryDetails.&lt;init&gt;(BasicCollectionLoadQueryDetails.java:60) ~[BasicCollectionLoadQueryDetails.class:4.3.1.Final]
        at org.hibernate.loader.plan.exec.internal.BatchingLoadQueryDetailsFactory.makeCollectionLoadQueryDetails(BatchingLoadQueryDetailsFactory.java:101) ~[BatchingLoadQueryDetailsFactory.class:4.3.1.Final]
        at org.hibernate.loader.collection.plan.AbstractLoadPlanBasedCollectionInitializer.&lt;init&gt;(AbstractLoadPlanBasedCollectionInitializer.java:77) ~[AbstractLoadPlanBasedCollectionInitializer.class:4.3.1.Final]
        at org.hibernate.loader.collection.plan.CollectionLoader.&lt;init&gt;(CollectionLoader.java:112) ~[CollectionLoader.class:4.3.1.Final]
        at org.hibernate.loader.collection.plan.CollectionLoader$Builder.byKey(CollectionLoader.java:105) ~[CollectionLoader$Builder.class:4.3.1.Final]
        at org.hibernate.loader.collection.plan.AbstractBatchingCollectionInitializerBuilder.buildNonBatchingLoader(AbstractBatchingCollectionInitializerBuilder.java:45) ~[AbstractBatchingCollectionInitializerBuilder.class:4.3.1.Final]
        at org.hibernate.loader.collection.BatchingCollectionInitializerBuilder.createBatchingCollectionInitializer(BatchingCollectionInitializerBuilder.java:71) ~[BatchingCollectionInitializerBuilder.class:4.3.1.Final]
        at org.hibernate.persister.collection.BasicCollectionPersister.createCollectionInitializer(BasicCollectionPersister.java:343) ~[BasicCollectionPersister.class:4.3.1.Final]
        at org.hibernate.persister.collection.AbstractCollectionPersister.postInstantiate(AbstractCollectionPersister.java:676) ~[AbstractCollectionPersister.class:4.3.1.Final]
        at org.hibernate.internal.SessionFactoryImpl.&lt;init&gt;(SessionFactoryImpl.java:484) ~[SessionFactoryImpl.class:4.3.1.Final]
        at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1857) ~[Configuration.class:4.3.1.Final]
        at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl$4.perform(EntityManagerFactoryBuilderImpl.java:850) ~[EntityManagerFactoryBuilderImpl$4.class:4.3.1.Final]
        at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl$4.perform(EntityManagerFactoryBuilderImpl.java:843) ~[EntityManagerFactoryBuilderImpl$4.class:4.3.1.Final]
        at org.hibernate.boot.registry.classloading.internal.ClassLoaderServiceImpl.withTccl(ClassLoaderServiceImpl.java:399) ~[ClassLoaderServiceImpl.class:4.3.1.Final]
        at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:842) ~[EntityManagerFactoryBuilderImpl.class:4.3.1.Final]
        at org.hibernate.jpa.HibernatePersistenceProvider.createContainerEntityManagerFactory(HibernatePersistenceProvider.java:150) ~[HibernatePersistenceProvider.class:4.3.1.Final]
        at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:336) ~[LocalContainerEntityManagerFactoryBean.class:4.0.1.RELEASE]
        at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:318) ~[AbstractEntityManagerFactoryBean.class:4.0.1.RELEASE]</pre> 
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                                            <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">I was able to prevent this exception by renaming <tt>key1</tt> to <tt>id</tt>.</p> 
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