Symptom
When trying to edit the Hierarchy of a Cost Center Group in the app 'Manage Cost Center Groups' you receive the message "Cost Center Group < > is locked by user < >".
Environment
SAP S/4HANA Cloud
Cause
This happens when the user mentioned in the message is already working in the same Hierarchy as you are. If the user is your own, this could happen when you open the Hierarchy in more than one window or browser.
Resolution
As is part of the System behavior to work one Cost Center at time, you have to wait until the user stops working in the Hierarchy. If it's your own user, it's recommended to work in this app in a single tab of your browser.
See Also
Keywords
Manage Cost Center Groups, Locked, Hierarchy , KBA , CO-OM-CCA-A , Master Data , CO-OM-CCA-A-2CL , Master Data (Public Cloud) , Problem