I can’t save or delete parts in the headers

Hello,

Maybe you are using a custom header on your site. Woodmart theme provides the option to create different headers for different pages: https://xtemos.com/docs-topic/how-to-set-different-header-for-specific-page/

You can check the custom header for a page or change it with the default header.
https://xtemos.com/docs-topic/options-for-pages/

Best Regards,