Hi Robert,
It is not ideal to set in that manner and if possible you should suppress setting, but you are probably ok in most reporting usage circumstances as the Previous Page dimension is mainly used as a correlation against the Pages dimension. Since a link request does not generate a page view it is not impacted by being set on links. It may impact utilization in straight pathing aspects or complicate certain segmentation construction scenarios.
It comes down to how the Previous Page report is utilized today at the organization weighed against LOE to fix.
Best,
Brian