Want OOB 'Sync child incident state' business rule to achieve the functionality of parent childIssue What is the name of the plugin needs to be installed to get the 'Sync child incident state' business rule in order to get the parent child functionality.Releasepre-KingstonCause"Sync Child Incident State" BR is coming from "Incident Management Best Practice - Kingston" plugin.(com.snc.best_practice.incident.kingston). Pre-Kingston customers will not be able to see/install the plugin 'Incident management best practices – Kingston'As mentioned in plugin description, this plugin is zboot only plugin and activation is not recommended for upgrade customers due to the fact that it has additional ACL, data policy, client scripts.ResolutionCan activate this plugin if really this functionality is needed but need to test it throughly in sub prod environment before pushing it to production. As ServiceNow did not tested this plugin for upgrade scenario, it may have undesired, unpredictable, untested and unsupported behavior.If the requirement is only want to sync state between parent & child then easier solution is to create/import required BRs into instance.