Any way to make EditorGUILayout.Popup select the right item but not just remember the index

I use an editor window and an asset database to keep data
like
xxx.ItemID = EditorGUILayout.Popup(xxx.ItemID, items);

the items is a dynamic list which read from another window editor.Which means it always changes!
But the EditorGUILayout.Popup only remembers the index of it.
So When the items list removes a thing.The selected item index in popup menu was not the previous place anymore!
So it chooses a wrong item AUTOMATICALLY

Any way to let the popup list remember the enum name or some unique id so won't let the selection mess up when its data changes!

Thanks