Unhandled 400 error when deselecting an already deselected element

Sentry Issue: ARKINDEX-FRONTEND-KQ

Error: Request failed with status code 400
  at call (./js/api.js:104:57)
  at u (None:1:410)
  at a (None:1:410)
  at l/</< (None:1:410)
  at l/< (None:1:410)
...
(35 additional frame(s) were not displayed)

1. Select any element
2. Open the selection list
3. Open the selection list in another tab
4. Unselect the element, or delete it entirely
5. In the other tab, unselect the element again
6. Profit

• There might be an extraneous throw or a missing catch that causes the issue to still be sent to Sentry.
• The backend could maybe still return a 204 from this as the deletion was already done?