Whether you mistakenly defined the rule and it opened up a lot of cases, or a large number of cases were accumulated over time, deleting them was simply impossible. The solution that appeared in the forums was to delete the cases as a resource directly from the database, but this form of deletion deletes the resource itself without removing the links to other resources. We, CyberSIEM, developed a tool that will delete the cases with the ArcSight API the right way, without hurting the job. How to use:
Anyway, DO NOT delete directly from the database.
How to use:
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