Aggregated disk writes

i have found the text below in iPhone analytics data. What does it mean please?

{"app_name":"aggregated","app_version":"","bug_type":"145","timestamp":"2020-02-06 08:20:33.14 +0300","os_version":"iPhone OS 13.3.1 (17D50)","incident_id":"34880E87-9A67-4A16-A17A-94D0369275CF","slice_uuid":"B722CBE6-961A-3300-80E4-2CC18CCFC143","build_version":"","is_first_party":true,"share_with_app_devs":true,"name":"aggregated"}

Date/Time: 2020-02-05 21:01:20 +0300

End time: 2020-02-06 08:20:32 +0300

OS Version: iPhone OS 13.3.1 (Build 17D50)

Architecture: arm64e

Report Version: 29

Incident Identifier: 34880E87-9A67-4A16-A17A-94D0369275CF

Data Source: Microstackshots

Shared Cache: 0x1a4e8000 A77981DC-1632-354B-978B-380DC657D1E6

Shared Cache: 0x24988000 A77981DC-1632-354B-978B-380DC657D1E6

Command: aggregated

Path: /System/Library/PrivateFrameworks/AggregateDictionary.framework/Support/aggregated

Version: ??? (???)

PID: 1811

Event: disk writes

Action taken: none

Writes: 1073.75 MB of file backed memory dirtied over 40752 seconds (26.35 KB per second average), exceeding limit of 12.43 KB per second over 86400 seconds

Writes limit: 1073.74 MB

Limit duration: 86400s

Writes caused: 1073.75 MB

Writes duration: 40752s

Duration: 40752.35s

Duration Sampled: 40679.60s

Steps: 263 ( (10.49 MB/step))

Hardware model: iPhone12,1

Active cpus: 6