How can I edit an exist journal?

[eunyeuny]

Hi，
I want to edit or delete an exist journal on my readmine, however,
issue.update() or issue.setNotes(note);
can only add a new notes to my issue...
I was searching and found the post(https://www.redmine.org/issues/10171)
: When the notes of the journal that does not have the associated journal_details are changed to empty, the journal record is deleted.
So I wrote the code like this
`RedmineManager mgr = RedmineManagerFactory.createWithApiKey(uri, apiAccessKey);
Transport transport = mgr.getTransport();

        Issue issue = mgr.getIssueManager().getIssueById(issueId, Include.journals);

        List<Journal> journalList = new ArrayList<>(issue.getJournals());

        for(Journal journal : journalList){
           if(journal.getId().equals(850180)){
                journal.setNotes("");
           }
        
        transport.updateObject(issue);`

but how to update jounal in issue?
jounal class doesn't implements Identifiable ...
so i don't know how to update jounal ..