conditions :
> using a treeModel
>assigning ID to the <treeItem>
>using the paging tree mold

When a node is re-rendered (after beeing closed, or after beeing brought back in the view from another page), a duplicate ID error occurs.

actions triggering the error :
>closing an open node
>rendering a node (by accessing it's page), accessing another page, then accessing the original page again.

see attached example