Im trying to make a database but my only problem is the jComboBox. If i want to change the deliver company its not showing the correct company that the person has like in the Picture That’s the example problem i have

I have a similar Code that i compared and which I searched for my mistake. I found it but can’t correct it because i don’t know WHY it’s not working and how to fix.

Im sorry if i missed something just write it down and I’ll add it afterwards.

Here is the Code of the jCombobox

  private void initComboboxVersand(List<VersandDTO> vrsndList) {
        int indexOfSelectedVersand = 0;
        GridBagConstraints gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 1;
        gridBagConstraints.gridy = 5;
        gridBagConstraints.anchor = java.awt.GridBagConstraints.WEST;
        gridBagConstraints.insets = new java.awt.Insets(11, 25, 11, 26);

        
        for (int i = 0; i < vrsndList.size(); i++) {
            jComboBoxVersand.addItem(vrsndList.get(i));
            if (vrsndList.get(i).getVersandid() == versandid) {
                indexOfSelectedVersand = i;
            }
        }
        getContentPane().add(jComboBoxVersand, gridBagConstraints);
        jComboBoxVersand.setSelectedIndex(indexOfSelectedVersand);
    }

here is the code from the constructor

    public ChangeVint(java.awt.Frame parent, boolean modal, List<VersandDTO> versand, int benutzerid, String bntzername, String vorname, String nachname, String artikelart, String preis, int versandid, String kaufdatum) {
        super(parent, modal);
       
        initComponents();
        initComboboxVersand(versand);

        this.benutzerid = benutzerid;
        this.bntzername = bntzername;
        this.vorname = vorname;
        this.nachname = nachname;
        this.artikelart = artikelart;
        this.preis = preis;
        this.versandid = versandid;
        this.kaufdatum = kaufdatum;

        //filling the text Fields
        fillTextField();
    }

Here is the code from the change() method to change it inside the database

    private void change() throws SQLException {
        Connection conn = DriverManager.getConnection(dbconnection, "root", "");
        String strInsert = "UPDATE verkauft "
                + "SET BenutzerID = ?, "
                + "Vorname = ?, "
                + "Nachname= ?, "
                + "Benutzername = ?,"
                + "Artikelart = ?,"
                + "Preis = ?,"
                + "VersandID = ?," // <-- thats for the Company id
                + "Kaufdatum = ?"
                + "WHERE BenutzerID = ?";
        PreparedStatement stmt = conn.prepareStatement(strInsert);
        stmt.setInt(1, Integer.parseInt(txtID.getText()));
        stmt.setString(2, txtVorname.getText());
        stmt.setString(3, txtNachname.getText());
        stmt.setString(4, txtBntzername.getText());
        stmt.setString(5, txtArtikelart.getText());
        stmt.setString(6, txtPreis.getText());
        stmt.setInt(7, ((VersandDTO) getjComboBoxVersand().getSelectedItem()).getVersandid());
        stmt.setDate(8, new java.sql.Date(dateChooser.getDate().getTime()));
        stmt.setInt(9, benutzerid);
        stmt.execute();

    }

Im not the best coder but i hope you understand it. Thanks for the help