Issue Boards: reordering lists fails when asignee list is present.

Summary

Customer reported(internal) that they were unable to re-arrange list in Issue board when a assignee list is present with error An error occurred while updating the board list. Please try again.

Looking at the network tab the Graphana call shows **The update was not successful"" see below

Steps to reproduce

1. Go to a project or group
2. Go to Issues>Boards
3. Create multiple list, including an assignee list
4. Try to move multiple times, around 3 or 4 an error will appear.

Example Project

https://gitlab.com/groups/gitlab-gold/-/boards

What is the current bug behavior?

Issue list fail to be re-organized after being able to move 3 or 4 times when a assignee list is present

What is the expected correct behavior?

Should be able to re-organized when a assignee list is present

Relevant logs and/or screenshots

API response:

[
  {
    "data": {
      "updateBoardList": {
        "list": {
          "id": "gid://gitlab/List/167",
          "title": "@reported_user_22",
          "position": 0,
          "listType": "assignee",
          "collapsed": false,
          "label": null,
          "__typename": "BoardList"
        },
        "errors": [
          "The update was not successful."
        ],
        "__typename": "UpdateBoardListPayload"
      }
    }
  }
]

Output of checks

Results of GitLab environment info

Expand for output related to GitLab environment info

(For installations with omnibus-gitlab package run and paste the output of:
`sudo gitlab-rake gitlab:env:info`)

(For installations from source run and paste the output of:
`sudo -u git -H bundle exec rake gitlab:env:info RAILS_ENV=production`)

Results of GitLab application Check

Expand for output related to the GitLab application check

(For installations with omnibus-gitlab package run and paste the output of:
sudo gitlab-rake gitlab:check SANITIZE=true)
(For installations from source run and paste the output of:
sudo -u git -H bundle exec rake gitlab:check RAILS_ENV=production SANITIZE=true)
(we will only investigate if the tests are passing)

Possible fixes

Delete the assignee list.