reassignFacesById does not seem to work

curl -s "http://SERVER:PORT/api/people/
<R-person-id>"
-H "x-api-key: <API_KEY>"

{"id": "<R-person-id>", "name": "R", ...}

curl -s "http://SERVER:PORT/api/faces?id=
<asset-id>"
-H "x-api-key: <API_KEY>"

[
{"id":"da0d22c9-...","person":{"id":"<N-person-id>","name":"N"}},
{"id":"05d25bc2-...","person":{"id":"<N-person-id>","name":"N"}},
{"id":"149c16e6-...","person":{"id":"<U-person-id>","name":"U"}}
]

curl -L -X PUT "http://SERVER:PORT/api/faces/05d25bc2-...
"
-H "x-api-key: <API_KEY>"
-H "Content-Type: application/json"
-d '{"id":"<R-person-id>"}'

{"message":"Not found or no person.update access","error":"Bad Request","statusCode":400,"correlationId":"z4lgohai"}