Brian Forkan ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) *created* an issue Hibernate ORM ( https://hibernate.atlassian.net/browse/HHH?atlOrigin=eyJpIjoiNzg2NjAwYTE1... ) / Bug ( https://hibernate.atlassian.net/browse/HHH-16340?atlOrigin=eyJpIjoiNzg2Nj... ) HHH-16340 ( https://hibernate.atlassian.net/browse/HHH-16340?atlOrigin=eyJpIjoiNzg2Nj... ) Duplicate column exception when using an EmbeddedId in a structure with Inheritance - Hibernate V6 ( https://hibernate.atlassian.net/browse/HHH-16340?atlOrigin=eyJpIjoiNzg2Nj... ) Issue Type: Bug Affects Versions: 6.0.0 Assignee: Unassigned Components: hibernate-orm-modules Created: 21/Mar/2023 04:18 AM Environment: Java 17 Hibernate ORM >6.0 Priority: Major Reporter: Brian Forkan ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) Caused by: org.hibernate.MappingException: Column 'TYPE' is duplicated in mapping for entity 'org.hibernate.bugs.JPAUnitTestCase$Node' (use '@Column(insertable=false, updatable=false)' when mapping multiple properties to the same column) The exception above happens in Hibernate 6.0 and above. https://github.com/brianforkan/hibernate-test-case-templates/commit/ea51a... ( https://github.com/brianforkan/hibernate-test-case-templates/commit/ea51a... ) I have created two test cases, one for Hibernate 5, which works fine and one for Hibernate 6 which fails. This is the structure I am using: @Entity(name = "Node") @Inheritance(strategy = InheritanceType.SINGLE_TABLE) @DiscriminatorColumn(name = "TYPE") @DiscriminatorOptions(insert = false) public static class Node { @EmbeddedId private NodeId id; @Column(name = "NAME") private String name; public Node(NodeId id, String name) { this.id = id; this.name = name; } public NodeId getId() { return id; } public void setId(NodeId id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } protected Node() { } } @Entity @DiscriminatorValue("NODEA") public static class NodeA extends Node { protected NodeA() { } public NodeA(NodeId nodeId, String name) { super(nodeId, name); } } @Entity @DiscriminatorValue("NODEB") public static class NodeB extends Node { protected NodeB() { } public NodeB(NodeId nodeId, String name) { super(nodeId, name); } } @Embeddable public static class NodeId implements Serializable { @Column(name = "ID") private String id; public String getId() { return id; } public NodeId() {} public NodeId(String id, String type) { this.id = id; this.type = type; } @Override public boolean equals(Object o) { if (this == o) { return true; } if (o == null || getClass() != o.getClass()) { return false; } NodeId nodeId = (NodeId) o; if (!Objects.equals(id, nodeId.id)) { return false; } return Objects.equals(type, nodeId.type); } @Override public int hashCode() { int result = id != null ? id.hashCode() : 0; result = 31 * result + (type != null ? type.hashCode() : 0); return result; } public void setId(String id) { this.id = id; } public String getType() { return type; } public void setType(String type) { this.type = type; } @Column(name = "TYPE", insertable = false, updatable = false) private String type; } ( https://hibernate.atlassian.net/browse/HHH-16340#add-comment?atlOrigin=ey... ) Add Comment ( https://hibernate.atlassian.net/browse/HHH-16340#add-comment?atlOrigin=ey... ) Get Jira notifications on your phone! Download the Jira Cloud app for Android ( https://play.google.com/store/apps/details?id=com.atlassian.android.jira.... ) or iOS ( https://itunes.apple.com/app/apple-store/id1006972087?pt=696495&ct=Em... ) This message was sent by Atlassian Jira (v1001.0.0-SNAPSHOT#100218- sha1:518c67a )