System Purge utility
Salesforce stores records in internal system objects for tracking, including Object Notifications, Log Entries, and Messages. To ensure the system only keeps the minimum number of records in these objects, a System Purge utility is available. This utility deletes older system object records on a rolling basis. The System Purge utility is enabled automatically upon upgrade.
You can always check to see the amount of storage used in every object in the System Overview page in Setup. If you see that the Object Notifications, Log Entries, or Messages objects use a large amount of storage, contact Amadeus Support.
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Overview: Configure property object retention
Activate Multi-Factor Authentication (MFA)