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Home Forums ACF PRO Use a current ACF image as the featured image Reply To: Use a current ACF image as the featured image

  • There isn’t any easy way to change the field name of a field once it has been used. The use of “_thumbnail_id” for the field name is something that you really need to do from the start before any data is added to a site.

    In order to update every post you would need to do a query to get every post, loop through them, get the value from the ACF field and then update the post thumbnail field.