We are planning to host a new JIRA instance for one of our teams and we configured that by cloning data from existing dump, cleaned the existing data, users, groups, projects etc. without changing the configuration schemes. As we have removed all the projects from this instance, is it safe to delete SEARCHREQUEST and FILTERNOTIFICATIONS tables for removing the existing filters and subscriptions? If not what is the best way to flush out 16000 filters from this instance.