JPA EntityManager operations order

I have run into interesting issue recently. I use in the project JPA + Hibernate + EJB. The issue concerns saving and deleting entities in the same transaction. Database table which is used has an unique constraint defined on two columns. What I have done was removing entity calling [crayon-604310231b9f8659612454/] then the new entity has been added with the same values in two properties associated with columns used in the unique constraint but different values in other properties using: [crayon-604310231ba02078167328/]

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