RM: How to Delete Process Runs and Associated Process Logs
Completed Process Runs and their associated logs can be deleted. Deletion can be automated by scheduling the "ffasync_RecordsDeletionScheduler" Apex class. Alternatively, individual Process Runs can be deleted manually from the Process Runs tab. This action also removes associated Process Logs, Process User Group Records, and child Process Runs and Logs. The retention period for these records is 90 days by default and is configurable. This functionality is available only in the Lightning UI.