dedupeString

The string Incident Manager uses to prevent the same root cause from creating multiple incidents in the same account.

A deduplication string is a term or phrase the system uses to check for duplicate incidents. If you specify a deduplication string, Incident Manager searches for open incidents that contain the same string in the dedupeString field when it creates the incident. If a duplicate is detected, Incident Manager deduplicates the newer incident into the existing incident.

By default, Incident Manager automatically deduplicates multiple incidents created by the same Amazon CloudWatch alarm or Amazon EventBridge event. You don't have to enter your own deduplication string to prevent duplication for these resource types.