Relationship exists in Resource object error about json-api-client-laravel

[JaZo]

Unfortunately this is by design. We follow the specification and that disallows attributes and relationships with the same name.

Fields for a resource object MUST share a common namespace with each other and with type and id. In other words, a resource can not have an attribute and relationship with the same name, nor can it have an attribute or relationship named type or id.

See: https://jsonapi.org/format/#document-resource-object-fields