[
  [
    "s1",
    "apply",
    10,
    5
  ],
  [
    "o1",
    "apply",
    8,
    10
  ],
  [
    "o1",
    "duplicate_id",
    8,
    15
  ],
  [
    "o1-retry",
    "old_version",
    8,
    20
  ],
  [
    "c1",
    "apply",
    10,
    10
  ],
  [
    "c2",
    "apply",
    10,
    10
  ],
  [
    "o2",
    "old_version",
    10,
    25
  ],
  [
    "s2",
    "apply",
    8,
    10
  ],
  [
    "s-old",
    "old_version",
    8,
    110
  ],
  [
    "o3",
    "apply",
    7,
    70
  ]
]