The issue is that PrivateOwned implicitly adds a Cascade REMOVE to the association/relationship.

So if you do NOT want the cascade REMOVE on the relationship but you do want PrivateOwned to automatically delete any beans that are removed from the collection then you can use:

@PrivateOwned(cascadeRemove=false)

@OneToMany(cascade=CascadeType.PERSIST,mappedBy="master")
	@PrivateOwned(cascadeRemove=false)
	List<TSDetailTwo> details;

See TestPrivateOwnedNoCascadeRemove for a test case example.