In addition to viewing crash details, from the Unique Crashes panel, you can select a unique crash, click Actions, and set the status to either open or closed. You can set the status to mark those unique crashes that you want to ignore or have fixed the root cause of.

When a crash is marked as closed, the crash will no longer trigger a new crash event, so you will not see the crash in the Events widget of the Mobile App Dashboard, the Events page, and it will not be included in alerts for new crashes.