Studio Script Sync creates duplicate scripts or folders

Issue
Syncing produces a second script or folder rather than updating the existing Instance.

Cause
The disk mapping does not identify the same Studio object, or both sides created an item before the first reconciliation.

Fix
Stop the sync session, preserve the intended source, and remove only the confirmed duplicate. Rebuild the mapping from a small clean root. Use unique stable names and avoid renaming the same object on disk and in Studio simultaneously.

Verify
Restart Studio and the sync session, then confirm one disk file maps to exactly one Instance.

Official Roblox Studio Script Sync preview