I use TFS. I try to add an item and I get an error message:
Cannot add the item. There already exists an item with the same name under source control that prevents this add operation from continuing. Please rename the item and try adding it again.
I've got this error after a number of rollbacks of some changesets (not all of them between a current and an initial changesets).
I am the only user of this TFS and only at one location. So it is not a problem that somebody didn't check in his/her changes.