Conflict occurs when VSS snapshot schedules or VSS snapshots have identical snapshot set names

An XML file is created when a VSS snapshot is taken. This XML file contains database and snapshot volume metadata. If two snapshot schedules, or a snapshot schedule and a VSS snapshot, are created with the identical snapshot set name and directory path, the schedule that is launched later overwrites the XML file that was created by the schedule or VSS snapshot operation that was launched earlier.

Since the earlier XML file does not exist, subsequent VSS reattach/VSS restore operations for that schedule or snapshot fails. (1303549)

Workaround: Ensure that snapshot set names are unique in a given directory path to avoid conflict with other VSS snapshot schedules or VSS snapshots.