Skip Custom fields identifiers

Hi, I’m importing post type posts to the Memsource. Together with the content I get also ACF identifiers like: time_of_departure or entries like: a:2:{i:0;s:14:"how_it_works";i:1;s:10:"trustpilot";} WordPress sections are imported in HTML format. So in settings, I entered the regexp to skip such entries like above: ^(?=.*[_{]+).*$ But it seems like such a regexp is ignored and only Comma-separated list of element names can be inserted here. The question is: Is there any way to filter out such entries using this plugin? This topic was modified 7 years, 3 months ago by Mariusz Szatkowski .