Reactjs 我想将msg添加到特定的主题数组中！这不起作用什么'；怎么了

这是我的初始状态聊天值

     textField: "",
     chats: {
       general: [
         { from: "virk", msg: "hello" },
         { from: "waleed", msg: "hi" },
       ],
       Topic2: [
         { from: "umer", msg: "umer here" },
         { from: "saith", msg: "hyyyyyyyyy" },
       ],
     },
     activeTopic: "",
   };

这是我添加消息对象的reducer.js功能

     case "RECEIVE_MSG":
          return {
            ...state,
            chats: {
      ...state.chats,
              [action.payload.topic]: [
                ...state.chats[action.payload.topic],
                { from: action.payload.from, msg: action.payload.msg },
              ],
            },
          }; 

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嗨，瓦利，欢迎来到SO。当您可以在问题中提供答案时，用户可以为您提供最佳帮助。看看是否可以更新示例以满足此要求。