When I use pdfcpu validate my.pdf on a document generated by a Xerox WorkCentre 7855 I get the following error:

validation error: dict=formStreamDict entry=OC: unsupported in version 1.4
This file could be PDF/A compliant but pdfcpu only supports versions <= PDF V1.7

In Acrobat this is a PDF 1.4 document. I can't control how WorkCentre exports the PDF. Is there a way to work around this issue?