我在mongoose中创建了一个Schema，当我启动node时，它崩溃了

const mongoose = require("mongoose");
const { DataView } = require("webidl-conversions");

const productSchema = new mongoose.Schema({
    name:{
        type:String,
        required:[true,"Please Enter Product Name"],
        trim:true
    },
    description:{
        type:String,
        required:[true,"Please Enter Product Description"]
    },
    price:{
        type:Number,
        required:[true,"Please Enter Product Price"],
        maxLength:[6,"Price cannot exceed 6 characters"]
    },
    rating:{
        type:Number,
        default:0
    },
    images:[
        {
            public_id:{
                type:String,
                required:true,
            },
            url:{
                type:String,
                required:true,
            }
        }
    ],
    category:{
        category:String,
        required:[true,"Please Enter Product Category"],
    },
    stock:{
        type:Number,
        required:[true,"Please Enter Product Stock"],
        maxLength:[4,"stock cannot excee 4 characters"],
        default:1
    },
    numOfReviews:{
        type:Number,
        default:0
    },
    reviews:[
        {
            name:{
                type:String,
                required:true,
            },
            rating:{
                type:Number,
                required:true,
            },
            comment:{
                type:String,
                required:true,
            }

        }
    ],
    createdAt:{
        type:Date,
        default:Date.now
    }
})

mosule.export = mongoose.model("Product",productSchema);

这是我的schema代码，我得到TypeError：无效的架构配置：无法确定数组category.required的嵌入类型。请参阅https://mongoosejs.com/docs/guide.html#definition了解更多关于支持的模式语法的信息此错误我不知道是什么问题，所以请帮助我，提前感谢