Async History Delete inserts bunch of warning rows

Camunda 7 Topics Discussion & Questions
1

Hi there, I need to clean-up my historic datas. I want to use REST APIs. Here my scenario:
Camunda 7.6.

/history/process-instance

{
    "processInstanceBusinessKey": "6768811"
}

It returns me some process datas. I map “id” field of each object. At the end, I try to delete async historic data.
/history/process-instance/delete

{
  "deleteReason": "you shall not pass!",
  "historicProcessInstanceIds": [
    "f69f1de2-fbeb-11e9-a97b-c0b6f9ad3743",
    "f7886cc4-fbeb-11e9-a97b-c0b6f9ad3743",
    "f7e35e1d-fbeb-11e9-a97b-c0b6f9ad3743",
    "f8203f2b-fbeb-11e9-a97b-c0b6f9ad3743",
    "f849723e-fbeb-11e9-a97b-c0b6f9ad3743",
    "f8e42bd5-fbeb-11e9-a97b-c0b6f9ad3743",
    "f99839d9-fbeb-11e9-a97b-c0b6f9ad3743",
    "faf8dac1-fbeb-11e9-a97b-c0b6f9ad3743",
    "fbfabac4-fbeb-11e9-a97b-c0b6f9ad3743"
  ],
  "historicProcessInstanceQuery": {
    "finished": "true",
    "finishedAfter": "2019-09-01T09:25:00"
  }
}

It removed my historic data from related tables but it also inserted some exception rows.

select count(*) from act_ru_job where handler_type_ = 'historic-instance-deletion'

returns 107 new rows with exception_msg_ = No historic process instances found is empty

select count(*) from act_ge_bytearray where name_ is null or name_ = 'job.exceptionByteArray'

returns 557 new rows.

AND my app console has these warnings.

Any idea what I’m doing wrong?