WSS 2.0 Upgrade To WSS 3.0 Failed With Violation of UNIQUE KEY constraint 'AllUserData_Url' Couple of days a ago I had a very strange problem performing full upgrade from TFS 2005 to TFS 2010, the TFS upgrade went just fine but the WSS upgrade from 2 to 3 throws many couple of wired errors. The WSS 2.0 to WSS 3.0 upgrade suppose to be “easy”, but this time I was though I got to a dead-end: WSS 2.0 Prescan –> Scan finished without failure. Installed WSS 3.0 and choose to perform Upgrade...