Activities by unidentified user "internalbootstapuser" issue is filling up audit logs
Note response below. However, still seeing same issue in later release as this user keep on updating or creating metric groupings.
Fix will be included in DX SaaS 26.2.1, to be released around early March.For the time being you can disregard those entries in the audit logs for this internal user internalbootstapuser as there is no impact in functionality.
Customer seeing fix in 26.2.1