One of the Information Debug Logs was showing the following error: Notice on lines 37 & 55 – 56 we have the really important info.
The error is thrown by the TFSJob Agent and the problem is that it is trying to load an item with the same key into a Dictionary.
The Work Items Latest and Work Items Are tables contain the current version of the work item.
As you make more changes, the historical versions of the work items will be noted in the Work Items Were table.
In general, you can pick either table from which to return the latest version; I use the Work Items Latest table.