The field ‘State’ contains the value ‘XXXX’ that is not in the list of supported values – AzureDevOps

Issue: You might have seen this error when you are trying to update a old workitem and this specifically occurs when you have opened a workitem

Solution : You may need to change the state to something and do updates. This error occurs because someone has deleted the state which the workitem was in & that may be the reason Azure DevOps throws such an error.