The list of properties and validations for a workflow task can be edited after the task has been created. The action type for a workflow task cannot be modified after the task is saved.
Request item properties for existing requests will be affected when task properties are added, removed, changed from editable to read-only, or reordered for a workflow task. Task properties which are removed will no longer be displayed for request items using the task. Property values defined for request items using task properties changed from editable to read-only will be discarded.