Change execution plan is opening the closed change tasks ,when it is not closed in the order which it is created inIssue There is an execution plan -XYZ which is creating some ctasks for specific change requests. When we are trying to close the change requests/ctask - it says invalid update + either recreate ctasks or reopens them. Steps to Reproduce: 1)Create change.2) Hit Save -> new CTASKS are created.3) Close all of the CTASKS (e.g. Closed Complete)4) Refresh task list again, some of the CTASKS will be reopened.CauseThe issue is caused due to the order in which the change tasks are being closed.Now, this is happening only when the tasks which are getting created via the execution plan are closed not considering the order.Based on the OOB business rule:Start Peer Task (change_task), this is reopening the change task if the predecessor task is not closed before a successor task is being closed.https://<instancename>.service-now.com/execution_plan_local_list.doYou can check the predecessor and successor task in the above table.https://<instancename>.service-now.com/sys_script.do?sys_id=8c8ad61b0a0a0b0100401615c2de0a91This happens only when the change task is being closed not considering the order in which they are being created via the execution plan.If they get closed by considering the order then the issue is not seen.ResolutionThis is expected as per the OOB business rule Start Peer Task (change_task) which is checking the predecessor and successor task.