I assume the conflict would arise if two adjacent parcels defined by fixed size borders were defined by different survey markers that moved relative to each other, creating a space that is unclaimed, a space that is claimed under both deeds, or some of both. Probably in the course of resolving this conflict the parties who owned the conflicted land would get new surveys performed and perhaps have additional survey markers installed to define the new border for both parcels.

The point of conflict here being that not every vertex of a parcel is necessarily defined by a survey marker.