def _construct_form(self, i, **kwargs):
form = super(MetadataFormset, self)._construct_form(i, **kwargs)<EOL>form.empty_permitted = False<EOL>form.has_changed = lambda: True<EOL>if self.instance:<EOL><INDENT>self.instance.__seo_metadata_handled = True<EOL><DEDENT>return form<EOL>
Override the method to change the form attribute empty_permitted