The data warehouse has detected data conflicts for the following work item fields. The conflicts occur because there are ...

The data warehouse has detected data conflicts for the following work item fields. The conflicts occur because there are differences in the attributes set for reportable fields that are defined across team project collections. Updates to the data warehouse will continue for project collection {0}. However, updates to the data for the conflicting fields are suspended until the conflicts are resolved. 

You can resolve these conflicts by making the definitions of the field the same in all project collections, or by marking the field as non-reportable in project collection {0}. For more information, see the following Microsoft Web site: http://go.microsoft.com/fwlink/?LinkId=160807.