I have created a Work Item Definition for TFS 2010 called "KB Item" and imported it to TFS server. After some KB Items were created in TFS, I needed to update the work item definition. I made some changes and imported new KB Item definition to TFS. Now I can reate new KB Items but can't update and save KB Items created prior to definition change.
I get the following error:
TF26212: Team Foundation Server could not save your changes. There may be problems with the work item type definition. Try again or contact your Team Foundation Server administrator.
I did google it but nothing worked.