mutate subdocument fails even if createPath option is provided

await collection.mutateIn('documentId', [

  couchbase.MutateInSpec.upsert(

    'path.to.sub.property',

    "test",

    {

      createPath: true,

    }

  ),

]) 

PathNotFoundError: path not found    at errorFromCpp (/home/ubuntu/my_project/node_modules/couchbase/dist/bindingutilities.js:508:20)    at /home/ubuntu/my_project/node_modules/couchbase/dist/connection.js:99:71 {  cause: [Error: path_not_found] {    ctxtype: ‘key_value’,    code: 113,    id: {      bucket: ‘my_bucket’,      scope: ‘_default’,      collection: ‘_default’,      key: ‘documentId’    },    opaque: 8382,    cas: Cas<0>,    status_code: 204,    enhanced_error_info: undefined,    last_dispatched_to: ‘10.10.1.150:11210’,    last_dispatched_from: ‘10.10.1.26:57564’,    retry_attempts: 0,    retry_reasons: []  },  context: KeyValueErrorContext {    status_code: 204,    opaque: 8382,    cas: Cas<0>,    key: ‘documentId’,    bucket: ‘my_bucket’,    collection: ‘_default’,    scope: ‘_default’,    context: ‘’,    ref: ‘’  }}