Root Cause: Faulty behavior of the Folder duplication process: OFS_Level incremented from 0. The root folder has always OFS_Level 1, the folder in it 2, and so on. After the duplication the root folder OFS_Level is 0.
Update to a fix version listed below or a newer version if available.
Fix Status: Released
Automation Engine 12.1.0 – Available
Automation Engine 12.0.1 – Available
Automation Engine 11.2.3 - Available
Create the folders manually or use xml-export.