You would have to change a lot more than just form_id. Formidable views are custom post types with the "frm_display" post_type. Because WordPress is a metadta schema, it means that a view's content is spread across wp_posts and wp_postmeta. You would have to change every reference to ids or keys for the form and its fields in the view. Some of the fields you are changing are serialized arrays, which means you have to be incredibly precise in changing the string content and their lengths. Nobody that I know of will support you duplicating a view manually. It's a lot of effort and there's much to much that can go wrong if you make even the slightest mistake. It would be much easier to create a new view and copy the content you want into the new view. Keep in mind duplicate keys and ids are not permitted. For more information about writing transportable code, please see this: https://formidable-masterminds.com/writing-transportable-code-keys-vs-ids/