Jtable (getselectedrow) returns -1

Hello, I am loading a file with some data that I have stored in a MySql database, then with a mouseclicked event I select a record to edit it and in that interface there is a button that shows me a jdialog to be able to edit some records of my database, the problem is that after I have edited a record or even if I close the jdialog without editing anything and I want to select another record, any record that I select returns me position -1.

The method to invoke the jdialog is as follows (although I do not think that is the problem):

private void btnActualizaUbicacionMouseClicked(java.awt.event.MouseEvent evt) {                                                   
    String rol = config.validacion();
    if (rol.equals("0")) {
        JOptionPane.showMessageDialog(null, "No tiene el permiso para editar la ubicación", "Aviso", JOptionPane.INFORMATION_MESSAGE);
    } else {
        ActualzarUbicacionDialog dialogUbic = new ActualzarUbicacionDialog(this, true);
        ActualzarUbicacionDialog.lblProd.setText(txtNombreProd.getText());
        dialogUbic.setVisible(true);
        if (dialogUbic != null) {
            if (!dialogUbic.getInfo().equals(" ")) {
                updateTabla();
                txtUbicacion.setText(dialogUbic.getUbic());
            } else {
                updateTabla();
            }
        }
    }
}