Michał Sobkiewicz ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) *updated* an issue Hibernate ORM ( https://hibernate.atlassian.net/browse/HHH?atlOrigin=eyJpIjoiY2RhOTFhOTA2... ) / Bug ( https://hibernate.atlassian.net/browse/HHH-15734?atlOrigin=eyJpIjoiY2RhOT... ) HHH-15734 ( https://hibernate.atlassian.net/browse/HHH-15734?atlOrigin=eyJpIjoiY2RhOT... ) orphanRemoval: Hibernate deletes entity if moved to freshly added parent ( https://hibernate.atlassian.net/browse/HHH-15734?atlOrigin=eyJpIjoiY2RhOT... ) Change By: Michał Sobkiewicz ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) Given the following tree-like structure… {code:java}@Entity class Node { @Id String id; @ManyToOne Node parent; @OneToMany(mappedBy = "parent", cascade = CascadeType.ALL, orphanRemoval = true) Set<Node> children; }{code} … I’d like to be able freely move children between parents. I can easily do that when all entities involved in such transaction (2 parents and 1 child) are already persistent. It’s impossible however to insert new (transient) node “between” two existing nodes. ---- I’m unable to make {noformat}a └── b{noformat} become {noformat}a └── x └── b{noformat} if x is transient, as Hibernate deletes b. ---- Adding {{x}} in between {{a}} and {{b}} involves 2 steps: # removing {{b}} from {{a.children}} # adding {{b}} to {{x.children}} I suppose that step 1. makes Hibernate to mark {{b}} for deletion. Step 2. should somehow undo this - and it does, but only when {{x}} is already managed (and so is {{x.children}} collection). It’s worth noting that {{x}}  becomes managed in the very same transaction because of {{CASCADE.ALL}} on {{a.children}}. I even tried to explicitly call {{persist(x)}} but it doesn't change anything - {{b}} is being deleted anyway. This looks like a bug. ---- I've created SSCCE: {noformat} git clone https://github.com/perceptron8/orphan-removal cd orphan-removal mvn test{noformat} ---- Please let me know if I can help somehow. ( https://hibernate.atlassian.net/browse/HHH-15734#add-comment?atlOrigin=ey... ) Add Comment ( https://hibernate.atlassian.net/browse/HHH-15734#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#100210- sha1:4037f92 )