Christian Beikov ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) *created* an issue Hibernate ORM ( https://hibernate.atlassian.net/browse/HHH?atlOrigin=eyJpIjoiMTJlZWM2NjVj... ) / Bug ( https://hibernate.atlassian.net/browse/HHH-16690?atlOrigin=eyJpIjoiMTJlZW... ) HHH-16690 ( https://hibernate.atlassian.net/browse/HHH-16690?atlOrigin=eyJpIjoiMTJlZW... ) Re-saving deleted object leads to constraint violation when unloaded delete happened ( https://hibernate.atlassian.net/browse/HHH-16690?atlOrigin=eyJpIjoiMTJlZW... ) Issue Type: Bug Affects Versions: 6.2.3 Assignee: Unassigned Components: hibernate-core Created: 25/May/2023 01:20 AM Priority: Major Reporter: Christian Beikov ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) We have plenty of code that checks EntityEntry.getStatus() == DELETED , but with the unloaded delete optimization we don’t create entity entries anymore. Since PersistenceContext contains deletedUnloadedEntityKeys though, we could still make this work but have to review all code paths that try to handle re-saving. Imagine a model like this @Entity public class EntityHolder { @Id Long id; @OneToOne SubEntity sub; } @Entity public class SubEntity { @Id Long id; String name; } When doing the following em.remove(em.getReference(SubEntity.class, 1L)); em.persist(new SubEntity(1L, "re-saved")); previous Hibernate versions forced a flush due to the re-saving. Current Hibernate doesn’t do that, because there is no entity entry with status DELETED anymore that would lead to this code. The entry is missing because the remove operation used the optimized unloaded deletion. The effect of this is, that the unique key constraint for EntityHolder#sub will now start to produce constraint violation exceptions. ( https://hibernate.atlassian.net/browse/HHH-16690#add-comment?atlOrigin=ey... ) Add Comment ( https://hibernate.atlassian.net/browse/HHH-16690#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- sha1:0428b75 )