If a filer has added Additional Services to their draft before changing the Filing Type to Service Only and progressing to the Summary page, this error will be generated by the system.
To resolve the error, head back to the Filings page and return to the Filing Requirements tab. Click the pencil icon on the document to edit it.
Change the Filing Type to either eFile Only or eFile and Serve.
Double-check the Lead Document; you may need to re-upload it. Double-check the Additional Services as well: they may have become de-selected or their quantities may have changed.