Node.js mongoose.com中的交叉表查询错误

我有两个收藏，有很多关系：

const mongoose = require("mongoose");
const Schema = mongoose.Schema;

const { userModel } = require("../../user/models/user.schema");

let TimesheetDataSchema;

const TimesheetSchema = Schema({
    managersComment: {
        type: String,
    },
    data: [{ type: Schema.Types.ObjectId, ref: 'TimesheetDataSchema' }]
});
TimesheetSchema.plugin(mongoosePaginate);
const timesheetModel = mongoose.model("Timesheet", TimesheetSchema);


TimesheetDataSchema = new Schema(
    {
        user: { type: Schema.Types.ObjectId, ref: userModel },
        parentId: { type: Schema.Types.ObjectId, ref: "TimesheetSchema" },
    },
    { timestamps: true }
);

TimesheetDataSchema.plugin(mongoosePaginate);
const TimesheetIndividualData = mongoose.model("TimesheetData", TimesheetDataSchema);

module.exports = { timesheetModel, TimesheetIndividualData };

在

TimesheetSchema

中，我将

TimesheetDataSchema

的ref保存在

数据数组中

插入操作正在成功运行，如下所示：

 {
    "_id" : ObjectId("60b3a6a2d9cf6a3500f51e26"),
    "data" : [ 
        ObjectId("60b3a6a2d9cf6a3500f51e28"), 
        ObjectId("60b3a6a2d9cf6a3500f51e29"), 
        ObjectId("60b3a6a2d9cf6a3500f51e2a"), 
        ObjectId("60b3a6a2d9cf6a3500f51e2b"), 
        ObjectId("60b3a6a2d9cf6a3500f51e2c")
    ],
    "__v" : 0
}

const result = await timesheetModel.find({ user: '607030ba3c82e235443db610' }).populate('data')

但是，当我尝试读取集合时，populate会给出如下错误：

 {
    "_id" : ObjectId("60b3a6a2d9cf6a3500f51e26"),
    "data" : [ 
        ObjectId("60b3a6a2d9cf6a3500f51e28"), 
        ObjectId("60b3a6a2d9cf6a3500f51e29"), 
        ObjectId("60b3a6a2d9cf6a3500f51e2a"), 
        ObjectId("60b3a6a2d9cf6a3500f51e2b"), 
        ObjectId("60b3a6a2d9cf6a3500f51e2c")
    ],
    "__v" : 0
}

const result = await timesheetModel.find({ user: '607030ba3c82e235443db610' }).populate('data')

我得到的错误是：

MissingSchemaError: Schema hasn't been registered for model "TimesheetDataSchema"

请帮助，无法解决此问题