Project Tasks are not editableIssue Project Tasks are not editableResolutionA Project Task with Child Projects Task(s) will not be editable. This is by design. 'pm_project_task.state' ACL has the condition - !current.rollup || current.sys_id == current.top_task.toString()The state field on the Project Task is editable only if it is the Top Task or if the Project Task does not have child Project Task(s).If you close all the child Project Tasks, then the state on the parent Project Task will automatically be set to Closed.Likewise, other fields on the parent Project Task are also not editable. They will be rolled up from the child Project Task(s).