When a mapped PDF is updated, you may need to change it without losing all the work you already had mapping it to your template. To do so, open the PDF mapper and click the “Toggle edit mode” button.
Once the edit mode is active (the button will stay green) click the “Replace underlying PDF” button and upload the new version of the document.
The system will expect the new document to have the same amount of pages as the original one. If new pages were added, especially in the beginning or middle of the document, the result will be a field structure that does not match the page where it was originally.