Mongodb在.deleteOne和.updateOne上创建重复项

Question

当尝试使用mongoose删除或编辑Mongodb上的文档时，在删除/编辑原始文档之前会创建一个重复的文档。此新文档具有新的_id。

后端路线

 router.delete("/:id", (req, res, next) => {
  const id = req.params.id;
  Customer.deleteOne({ _id: id })
    .exec()
    .then(result => {
      res.status(200).json({
      message: "Deleted Successfuly"
     });
    })
    .catch(err => {
      console.log(err);
      res.status(500).json({
        error: err
      })
    });
});



router.put("/:id",(req, res, next) => {
  const cust = new Customer ({
    _id: req.params.id,
    name: req.body.name,
    address: req.body.address,
    city: req.body.city,
    payment: req.body.payment
  });
  Customer.updateOne({_id: req.params.id}, cust)
    .exec()
    .then(result => {
      console.log(result);
      res.status(200).json({message: "update success"})
    })
    .catch(err => {
      console.log(err);
      res.status(500).json({
        error: err
      })
    });
});

从服务中截取

 deleteCustomer(customerId: string) {
    this.http.delete('http://localhost:3000/api/customers/' + customerId )
      .subscribe((response) => {
        console.log(response);
        console.log(this.customers);
        this.getCustomers();
      });
  }

  editCustomer(id: string, editedCustomer: Customer) {
    this.http.put('http://localhost:3000/api/customers/' + id, editedCustomer)
    .subscribe((response) => {
      console.log(response);
      this.getCustomers();
    });
  }

我没有收到任何错误，并收到了成功状态消息。

关于我为什么要重复的任何想法？

随时请求其他任何相关数据。