您好，我無法在反應中更新嵌套對象狀態。當我嘗試這樣做時，我在所有孩子中都遇到了錯誤（來自父母的未定義道具）。這是我的代碼：    updateColumn(newSubject,dayId,order){        console.log("tu som");        console.log(newSubject);        console.log(dayId);        console.log(order);        console.log(this.state.schedule);        //Problematic part:        let newSchedule = this.state.schedule;        newSchedule.days[dayId].slots[order] = newSubject;        console.log("newSchedule");        console.log(newSchedule);        this.setState({schedule:this.state.schedule});        console.log("this new state");        console.log(this.state.schedule);        //State changed but error shows    }