Gavin King ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) *created* an issue Hibernate ORM ( https://hibernate.atlassian.net/browse/HHH?atlOrigin=eyJpIjoiY2QyY2IzNjVk... ) / Bug ( https://hibernate.atlassian.net/browse/HHH-16593?atlOrigin=eyJpIjoiY2QyY2... ) HHH-16593 ( https://hibernate.atlassian.net/browse/HHH-16593?atlOrigin=eyJpIjoiY2QyY2... ) mappedBy non-association ( https://hibernate.atlassian.net/browse/HHH-16593?atlOrigin=eyJpIjoiY2QyY2... ) Issue Type: Bug Assignee: Unassigned Components: hibernate-core Created: 11/May/2023 12:07 PM Priority: Major Reporter: Gavin King ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) The following mapping resulted in a CCE: @Entity static class Loan { @Id @Column(name = "LOAN_ID" ) private Long id; @OneToMany(cascade = PERSIST, mappedBy = "exLoanId" ) private List<Extensions> extensions = new ArrayList<>(); } @Entity static class Extensions { @Id @Column(name = "EX_LOAN_ID" ) private Long exLoanId; @Id @Column(name = "EX_NO" ) private Long exNo; @Column(name = "EX_EXTENSION_DAYS" ) private Long exExtensionDays; } I have fixed this, because it was easy. ( https://hibernate.atlassian.net/browse/HHH-16593#add-comment?atlOrigin=ey... ) Add Comment ( https://hibernate.atlassian.net/browse/HHH-16593#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#100225- sha1:84d3b45 )