What can cause 422 UnprocessableEntity while deleting a ticket using the API

We try to delete tickets using the API and get a 422 response.

{"error":"RecordInvalid","description":"Record validation errors","details":{}}

I  dont know what to think of it as the ticket seems to be deleted afterwards and there is no body that could be wrong.

Anyone else had the same expericence? Most deletion request seems to go through returning 204.