Tasks are removed from the TFS release definition

Question

We are updating TFS 2017 3. This problem appeared after updating from the TFS 2017 1 update.

And we have many custom TFS tasks developed by us.

At the time the user opens the release definition or release definition, the user is prompted that "Tasks not found", as shown below.

Suppose the user clicks OK.

Then there is this dangerous option "Save." Saving it eliminates the problem, and it is not at all so easy to return a definition to history.

I’m more interested in knowing why this invitation appears.

Answer 1

, . - , , .

, .

, TFS API, api-version. , . API TFS / TFS. TFS 2017 Update 1, API TFS 2017 Update 3.

, REST api. , , . , , , , , api, .

, , , , . , . , , , .

Answer 2

, . , TFS TFS 2018, .