The field ‘State’ contains the value that is not in the list of supported values | Azure DevOps
Issue :The field ‘State’ contains the value ‘XXXXX’ that is not in the list of supported values.
Solution : This issue occurs whenever a workitem has a state that has been removed from the process template of the workitem. For example if you admin removes the state “Fixed” from Bug template you will get such an error.
To fix this issue, update the state to changed states that has been implemented or just create a query with removed state as one of the filter & then do a mass update to all the workitems containing this state