How to convert the tree component(groupsTree) in the Extended Group Entity

Hi…
I am extending the Group Entity by adding an additional attribute “description”. And i am extending the generic UI Screen. Now i also want to display the description in the groupsTree. So, i tried to use the treeTable and added the columns… But i am getting the warning like “Incorrectly named element in the extended screen…” Please help me resolve the issue… thanks…

Please provide a test project with the code that doesn’t work for you.