I am trying to migrate a TFS 2015 Scrum project to VSTS. I successfully migrated this project in December 2015. Two days ago I deleted the target project in VSTS and attempted to migrate the same project again. This time, I get a validation error:
This question has raised a similar issue, but there is no clear answer as the OP noted that OpsHub has indicated that there is a known issue with Microsoft making a change to how VSTS projects are created, but there was no indication of when this would be fixed.