我的模型：

Email_Sender: {
        type: String,
        trim: true,
        required: true
    },
    Email_Receiver: {
        type: String,
        trim: true,
        required: true
    },
    Message: [{
        msg: {
            type: String,
            trim: true
        },
        Date: {
            type: String,
            trim: true
        },
        Email: {
            type: String,
            trim: true
        }
    }]

const get_save_chat_emais = new chat({
                    Email_Sender : s_email,
                    Email_Receiver: r_email,
                    Message: [{
                        msg : message,
                        Date : date,
                        Email : r_email
                    }]
                });

await get_save_chat_emais.save();

MongoError： E11000重复键错误集合：chat_database.chats index：Email_Sender_1dup key：{Email_Sender："abc@gmail.com"}

• 我不使用唯一：true但在电子邮件上收到重复错误*