def add_span(self, langfuse_span_data: LangfuseSpan | None = None):

        data = filter_none_values(langfuse_span_data.model_dump()) if langfuse_span_data else {}

        try:

            body = CreateSpanBody(          # ← 不要动这一行，在它上面插入

                id=data.get("id"),