About method Insert

[Phantom-KNA]

I have tried to use this method, to save a value of uiid whatever call primary, but it throws the following error.
I have checked the id value and it is not being sent as null. Is this a bug or am I missing something?

Unhandled exception. Postgrest.RequestException: null value in column "id" of relation "favorites" violates not-null constraint
at Postgrest.Helpers.MakeRequest(ClientOptions clientOptions, HttpMethod method, String url, JsonSerializerSettings serializerSettings, Object data, Dictionary2 headers, CancellationToken cancellationToken) at Postgrest.Helpers.MakeRequest[T](ClientOptions clientOptions, HttpMethod method, String url, JsonSerializerSettings serializerSettings, Object data, Dictionary2 headers, Func`1 getHeaders, CancellationToken cancellationToken)