It seems there are projects with duplicating names in your solution and this is not handled by the wizard. We will fix this right away. As a workaround I would suggest you to temporarily rename one of the projects in order to run the wizard or upgrade the references manually by removing and adding them again.
Thank you for bringing this to us, your Telerik points have been updated.
the Telerik team
Do you want to have your say when we set our development plans?
Do you want to know when a feature you care about is added or when a bug fixed?
Telerik Public Issue Tracking
system and vote to affect the priority of the items