cvat: Skeleton annotation task: can't export dataset

My actions before raising this issue

• Read/searched the docs
• Searched past issues

Without skeletal annotation (or only bbox), I can’t succesfully export the data. Once I annotated the task, upon export as ‘COCO Keypoints 1.1’ I have the following error:

Expected Behaviour

The annotation and images are exported.

Current Behaviour

Can’t export dataset with skeletal anntotation

Steps to Reproduce (for bugs)

1. Upload data to create a task
2. Annotate a skeletal track
3. Export the dataset

Your Environment

• Git hash commit (git log -1): 46b88c11ab2bbb4989365899196bf4157ee94b90
• Docker version docker version (e.g. Docker 17.0.05): 20.10.21
• Are you using Docker Swarm or Kubernetes? No
• Operating System and version (e.g. Linux, Windows, MacOS): Ubuntu 22.04
• Other diagnostic information / logs: The way I defined the annotations in the project:

[
  {
    "name": "person",
    "id": 22,
    "color": "#c06060",
    "type": "any",
    "attributes": []
  },
  {
    "name": "pose",
    "id": 66,
    "color": "#1446c2",
    "type": "skeleton",
    "sublabels": [
      {
        "name": "head",
        "attributes": [],
        "type": "points",
        "color": "#d12345",
        "id": 67
      },
      {
        "name": "l_shoulder",
        "attributes": [],
        "type": "points",
        "color": "#350dea",
        "id": 68
      },
      {
        "name": "l_elbow",
        "attributes": [],
        "type": "points",
        "color": "#479ffe",
        "id": 69
      },
      {
        "name": "l_hand",
        "attributes": [],
        "type": "points",
        "color": "#4a649f",
        "id": 70
      },
      {
        "name": "r_shoulder",
        "attributes": [],
        "type": "points",
        "color": "#478144",
        "id": 71
      },
      {
        "name": "r_elbow",
        "attributes": [],
        "type": "points",
        "color": "#57236b",
        "id": 72
      },
      {
        "name": "r_hand",
        "attributes": [],
        "type": "points",
        "color": "#1cdda5",
        "id": 73
      }
    ],
    "svg": "<line x1=&quot;68.81401824951172&quot; y1=&quot;26.254180908203125&quot; x2=&quot;46.40599060058594&quot; y2=&quot;12.374582290649414&quot; stroke=&quot;black&quot; data-type=&quot;edge&quot; data-node-from=&quot;5&quot; stroke-width=&quot;0.5&quot; data-node-to=&quot;1&quot;></line><line x1=&quot;77.8441162109375&quot; y1=&quot;43.4782600402832&quot; x2=&quot;66.138427734375&quot; y2=&quot;65.0501708984375&quot; stroke=&quot;black&quot; data-type=&quot;edge&quot; data-node-from=&quot;6&quot; stroke-width=&quot;0.5&quot; data-node-to=&quot;7&quot;></line><line x1=&quot;68.81401824951172&quot; y1=&quot;26.254180908203125&quot; x2=&quot;77.8441162109375&quot; y2=&quot;43.4782600402832&quot; stroke=&quot;black&quot; data-type=&quot;edge&quot; data-node-from=&quot;5&quot; stroke-width=&quot;0.5&quot; data-node-to=&quot;6&quot;></line><line x1=&quot;23.997961044311523&quot; y1=&quot;28.595317840576172&quot; x2=&quot;68.81401824951172&quot; y2=&quot;26.254180908203125&quot; stroke=&quot;black&quot; data-type=&quot;edge&quot; data-node-from=&quot;2&quot; stroke-width=&quot;0.5&quot; data-node-to=&quot;5&quot;></line><line x1=&quot;23.997961044311523&quot; y1=&quot;28.595317840576172&quot; x2=&quot;46.40599060058594&quot; y2=&quot;12.374582290649414&quot; stroke=&quot;black&quot; data-type=&quot;edge&quot; data-node-from=&quot;2&quot; stroke-width=&quot;0.5&quot; data-node-to=&quot;1&quot;></line><line x1=&quot;12.292276382446289&quot; y1=&quot;47.15719223022461&quot; x2=&quot;24.666858673095703&quot; y2=&quot;65.88628387451172&quot; stroke=&quot;black&quot; data-type=&quot;edge&quot; data-node-from=&quot;3&quot; stroke-width=&quot;0.5&quot; data-node-to=&quot;4&quot;></line><line x1=&quot;23.997961044311523&quot; y1=&quot;28.595317840576172&quot; x2=&quot;12.292276382446289&quot; y2=&quot;47.15719223022461&quot; stroke=&quot;black&quot; data-type=&quot;edge&quot; data-node-from=&quot;2&quot; stroke-width=&quot;0.5&quot; data-node-to=&quot;3&quot;></line><circle r=&quot;1.5&quot; stroke=&quot;black&quot; fill=&quot;#b3b3b3&quot; cx=&quot;46.40599060058594&quot; cy=&quot;12.374582290649414&quot; stroke-width=&quot;0.1&quot; data-type=&quot;element node&quot; data-element-id=&quot;1&quot; data-node-id=&quot;1&quot; data-label-id=&quot;67&quot;></circle><circle r=&quot;1.5&quot; stroke=&quot;black&quot; fill=&quot;#b3b3b3&quot; cx=&quot;23.997961044311523&quot; cy=&quot;28.595317840576172&quot; stroke-width=&quot;0.1&quot; data-type=&quot;element node&quot; data-element-id=&quot;2&quot; data-node-id=&quot;2&quot; data-label-id=&quot;68&quot;></circle><circle r=&quot;1.5&quot; stroke=&quot;black&quot; fill=&quot;#b3b3b3&quot; cx=&quot;12.292276382446289&quot; cy=&quot;47.15719223022461&quot; stroke-width=&quot;0.1&quot; data-type=&quot;element node&quot; data-element-id=&quot;3&quot; data-node-id=&quot;3&quot; data-label-id=&quot;69&quot;></circle><circle r=&quot;1.5&quot; stroke=&quot;black&quot; fill=&quot;#b3b3b3&quot; cx=&quot;24.666858673095703&quot; cy=&quot;65.88628387451172&quot; stroke-width=&quot;0.1&quot; data-type=&quot;element node&quot; data-element-id=&quot;4&quot; data-node-id=&quot;4&quot; data-label-id=&quot;70&quot;></circle><circle r=&quot;1.5&quot; stroke=&quot;black&quot; fill=&quot;#b3b3b3&quot; cx=&quot;68.81401824951172&quot; cy=&quot;26.254180908203125&quot; stroke-width=&quot;0.1&quot; data-type=&quot;element node&quot; data-element-id=&quot;5&quot; data-node-id=&quot;5&quot; data-label-id=&quot;71&quot;></circle><circle r=&quot;1.5&quot; stroke=&quot;black&quot; fill=&quot;#b3b3b3&quot; cx=&quot;77.8441162109375&quot; cy=&quot;43.4782600402832&quot; stroke-width=&quot;0.1&quot; data-type=&quot;element node&quot; data-element-id=&quot;6&quot; data-node-id=&quot;6&quot; data-label-id=&quot;72&quot;></circle><circle r=&quot;1.5&quot; stroke=&quot;black&quot; fill=&quot;#b3b3b3&quot; cx=&quot;66.138427734375&quot; cy=&quot;65.0501708984375&quot; stroke-width=&quot;0.1&quot; data-type=&quot;element node&quot; data-element-id=&quot;7&quot; data-node-id=&quot;7&quot; data-label-id=&quot;73&quot;></circle>",
    "attributes": [
      {
        "id": 3,
        "name": "track_id",
        "input_type": "select",
        "mutable": false,
        "values": [
          "1",
          "2",
          "3",
          "4",
          "5",
          "6",
          "7",
          "8",
          "9",
          "10"
        ],
        "default_value": "1"
      }
    ]
  }
]