@florent One last update. I reverted to Master branch (6699b) yesterday evening and the backup ran without issues overnight.

Hi @simonp, thanks again. Great service!!

I have checked out your fix branch and re-run the backup. It succeeded as seen here:

{
  "data": {
    "mode": "delta",
    "reportWhen": "always"
  },
  "id": "1772725052650",
  "jobId": "73d72ea9-f25e-4c88-878c-98af27c1a827",
  "jobName": "Daily backup of Unix VMs with changing data",
  "message": "backup",
  "scheduleId": "9cbc3238-382d-4fae-83c0-4e92348898e5",
  "start": 1772725052650,
  "status": "success",
  "infos": [
    {
      "data": {
        "vms": [
          "c54a256e-0493-5c6d-a0cd-c3a4618f99a1"
        ]
      },
      "message": "vms"
    }
  ],
  "tasks": [
    {
      "data": {
        "type": "VM",
        "id": "c54a256e-0493-5c6d-a0cd-c3a4618f99a1",
        "name_label": "MailCW"
      },
      "id": "1772725054418",
      "message": "backup VM",
      "start": 1772725054418,
      "status": "success",
      "tasks": [
        {
          "id": "1772725054426",
          "message": "clean-vm",
          "start": 1772725054426,
          "status": "success",
          "tasks": [
            {
              "id": "1772725055044",
              "message": "merge",
              "start": 1772725055044,
              "status": "success",
              "end": 1772725196294
            }
          ],
          "end": 1772725196304,
          "result": {
            "merge": true
          }
        },
        {
          "id": "1772725197030",
          "message": "snapshot",
          "start": 1772725197030,
          "status": "success",
          "end": 1772725198708,
          "result": "e46c757e-9180-2502-81c5-36a2fb2928fc"
        },
        {
          "data": {
            "id": "fd6bbd08-52dd-43eb-84df-f93b54fc28e9",
            "isFull": false,
            "type": "remote"
          },
          "id": "1772725198708:0",
          "message": "export",
          "start": 1772725198708,
          "status": "success",
          "tasks": [
            {
              "id": "1772725200147",
              "message": "transfer",
              "start": 1772725200147,
              "status": "success",
              "end": 1772725224785,
              "result": {
                "size": 2768240640
              }
            },
            {
              "id": "1772725225673",
              "message": "clean-vm",
              "start": 1772725225673,
              "status": "success",
              "end": 1772725225747,
              "result": {
                "merge": true
              }
            }
          ],
          "end": 1772725225757
        }
      ],
      "end": 1772725225758
    }
  ],
  "end": 1772725225759
}