def data_copy_and_paste(model, from_field, to_field):
    """
    The purpose of this function is to "copy-paste" data from one `foreign key` field to another.
    This function is particularly useful for data migrations.
    :param model: Model source of both Foreign Key fields.
    :param from_field: String representation of the field name which is the source of the data.
    :param to_field: String representation of the field name which is the destination of the data.
    """
    for row in model.objects.all():
        setattr(row, to_field, getattr(row, from_field))
        row.save(update_fields=[to_field])
