Core sync conflict management
Core sync exportable items have a unique ID that helps Endpoint Manager track whether items are the same or not. This helps synchronization manage sync item conflicts. If you copy or sync an item on one server and that same item exists on the target server, that item will only be overwritten if the items share the same unique ID. That unique ID consists of the core server name and the database row number containing that item. You can see an item's unique ID and revision number in an item's information dialog (right-click the item and click Info).
If two items with the same name have a different ID, synchronization will leave the original alone on the target and add a %1 to the sync item's filename. Synchronization will keep creating new entries on subsequent sync conflicts and increment this number for each one until the limit of 99 is reached.