Cannot modify or create new items with `id`-style contexts

[cubap]

{
   "id":"annotorious-placeholder-id-00001",
   "@context":"http://www.w3.org/ns/banno.jsonld",
   "type":"Annotation",
   "motivation":"transcribing",
   "target":"https://tpen-project-examples.habesoftware.app/transcription-project/canvas-1.json#xywh=1550,1620,2170,290",
   "body":{
      "type":"TextualBody",
      "value":"Heilige Ceremonien *und",
      "format":"text/plain",
      "language":"de"
   }
}

Is an example that will work until you "fix" the @context to "@context":"http://www.w3.org/ns/anno.jsonld" and then you'll see error:

Caught Error:TypeError [ERR_HTTP_INVALID_HEADER_VALUE]: Invalid value
"undefined" for header "Location"