ValueList: Clicking "Add" button for selection:listitem on document editor results in error when "value list item" is added as compound field in one of the existing document type

Steps to reproduce:--.
1.Go to document types.
2.Select any existing document type eg. products.
3.Add "value list item" compound Field in that document type & commit the changes.
4.Go to documents & create a new document with "products" document type which is altered above.
5.Try to click on "Add" button under selection:listitem .
6.Internal error is logged in console & nothing happens on UI.
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[INFO] [talledLocalContainer] 12.06 12:30:20 ERROR [ChildNodeProvider.java:92] Internal error

Expected:-->"Key","Label" should be added in UI when clicked on Add button with no error in console.

check screenshot for reference.