This question has been answered by anotherplace. See the first response.
As this is a follow-up to this post I will write it here.
I have completed the stages that I wrote down here & here and have tested it fully.
The only extra thing I had to do was to give the duplicated parent a new alias
All sub- / child pages had their original alias and were published
It all works in the back-end and the pages are shown in the front-end
I am not able to replicate the problem you are having - sorry
I have now tried this on three sites - they all work as expected
One difference I have - I am running 1.0.15
You may want to try the Russian forum or post your problem on GitHub
if ($modx->db->getValue($modx->db->select('count(id)', $modx->getFullTableName('site_tmplvars'), "name='documentTags'"))) { mm_widget_tags('documentTags', ' '); // Give blog tag editing capabilities to the 'documentTags (3)' TV } mm_widget_showimagetvs(); // Always give a preview of Image TVs mm_createTab('Параметры', 'param', '', '10', '', '100%'); mm_moveFieldsToTab('tv_color,zimg,price,tv_designer,tv_style,tv_articul,tv_size,tv_weight,tv_insert,tv_newbe,tv_forder,tv_imgs','param'); mm_createTab('Слайдеры', 'slider', '', '4', '', '100%'); mm_moveFieldsToTab('sliderimgs1,sliderimgs2,sliderimgs3','slider'); mm_createTab('SEO', 'seo', '', '', '', '100%'); mm_moveFieldsToTab('seodescription,seokeywords,seotitle,sitemap_exclude,sitemap_changefreq,sitemap_priority,seoOverride','seo'); mm_ddMultipleFields('tv_imgs', '', '', 'field', '','350'); mm_ddMultipleFields('sliderimgs1', '', '', 'text,text,field', 'Заголовок,Ссылка,Изображение','200,300,200'); mm_ddMultipleFields('sliderimgs2', '', '', 'text,text,field', 'Заголовок,Ссылка,Изображение','200,300,200'); mm_ddMultipleFields('sliderimgs3', '', '', 'text,text,field', 'Заголовок,Ссылка,Изображение','200,300,200');
INSERT INTO `dst_products_parents` (`doc_id`, `parent_id`) VALUES ('$doc_id', '$parent_id')