Error TF400129: Verifying that the team project collection has space for new system fields when upgrading TFS to 2012.2
Whist testing an upgrade of TFS 2010 to TFS 2012.2 I was getting a number of verification errors in the TFS configuration upgrade wizard. They were all TF400129 based such as TF400129: Verifying that the team project collection has space for new system fields but also mention models and schema. A quick search threw up this thread on the subject, but on checking the DB tables I could see my problem was all together more basic....