def _create_update_move_finished(self):
    """ This is a helper function to support complexity of onchange logic for MOs.
    It is important that the special *2Many commands used here remain as long as function
    is used within onchanges.
    """
    # keep manual entries
    list_move_finished = [(4, move.id) for move in self.move_finished_ids.filtered(
        lambda m: not m.byproduct_id and m.product_id != self.product_id)]
    list_move_finished = []
    moves_finished_values = self._get_moves_finished_values()
    moves_byproduct_dict = {move.byproduct_id.id: move for move in self.move_finished_ids.filtered(lambda m: m.byproduct_id)}
    move_finished = self.move_finished_ids.filtered(lambda m: m.product_id == self.product_id)
    for move_finished_values in moves_finished_values:
        if move_finished_values.get('byproduct_id') in moves_byproduct_dict:
            # update existing entries
            list_move_finished += [(1, moves_byproduct_dict[move_finished_values['byproduct_id']].id, move_finished_values)]
        elif move_finished_values.get('product_id') == self.product_id.id and move_finished:
            list_move_finished += [(1, move_finished.id, move_finished_values)]
        else:
            # add new entries
            list_move_finished += [(0, 0, move_finished_values)]
    self.move_finished_ids = list_move_finished