[xwiki-users] Issues when I upgraded my xwiki 7.0.1 to xwiki 8.2.1: breadcrumb question

Hello, About my "I upgraded my xwiki 7.0.1 to xwiki 8.2.1" episode, I have a new question (last one I hope). On Xwiki 7.0.1 some users modify parent/page (breadcrumb path) but when I upgraded to xwiki 8.2.1, this breadcrumb are lost because the breadcrumb show now the true emplacement of current page. I have some question about it: - For all pages with breadcrumb modified, I must convert manually terminale "parent"page in none terminale page ? - how can I retrieve these pages with breadcrumb modified ? - when I upgrade xwiki the old breadcrumb information is lost (overwrited by new one)? Thxs. Pascal BASTIEN