org.hibernate.PersistentObjectException: detached entity passed to persist exception

Question

I\'m creating a simple app to just insert a row to a table (if table does not exist, create it) using Java JPA.

I\'m attaching some code for a runnable exam

Answer 1

In the class definition you have annotated id to be generated by strategy (table, sequence, etc.) chosen by the persistence provider, but you are initializing the id of the Person object through constructor. I think leaving id null may solve your problem.