When using multiple correlators to deploy an Apama query application, it is the administrator's responsibility to keep the resources of the exported project up to date. If changes are made to a query, if queries are added or removed from a project, then all correlators should be updated to reflect the new state. It is possible to inject queries into a live running correlator, or delete queries from a correlator. Make sure that the injections and deletions are performed on all correlators in the cluster.