Why can't I attach TFS to a Project Collection that was restored to SQL Server (I think) correctly?

Question

We tried moving a TFS Project Collection from one TFS 2010 server to another.

1. Detached the collection in TFS Console on source server
2. Backed up the co

Answer 1

Just as additional information...

KMoraz if right. Both TFS and SQL Server are made to run together at the same version (The Major version).

To explain how you probably get there is:

• You made a backup of you TFS database
• You upgraded TFS version (TFS migrated your database - it became another version)
• You restored your backup (TFS database version is now older that TFS version itself)