kodo.util.OptimisticVerificationException: There was 1 optimistic locking error detected when flushing to the data store.  This indicates that an object was concurrently modified in another transaction.  The exception in the nested throwables array contains a failed object representing a concurrently modified object.  Failed object id: [com.jozmas.wanote.db.INote-299]
NestedThrowables:
kodo.util.OptimisticVerificationException: An optimistic lock violation was detected when flushing object "com.jozmas.wanote.db.Catalog@5cc270" with id "com.jozmas.wanote.db.INote-299" to the data store.  This indicates that the object was concurrently modified in another transaction.
FailedObject:com.jozmas.wanote.db.Catalog@5cc270
    kodo.runtime.PersistenceManagerImpl.flushInternal(PersistenceManagerImpl.java:802)
    kodo.runtime.PersistenceManagerImpl.beforeCompletion(PersistenceManagerImpl.java:644)
    kodo.runtime.LocalManagedRuntime.commit(LocalManagedRuntime.java:69)
    kodo.runtime.PersistenceManagerImpl.commit(PersistenceManagerImpl.java:416)
    com.jozmas.wanote.web.WebNewNote.createNoteWithParent(WebNewNote.java:112)
    com.jozmas.wanote.web.WebNewNote.doPost(WebNewNote.java:81)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:802)