Is it correct to have a URL which using both backslash and forward slash in it? (Node.js express multer)

Question

I'm using the multer package to let visitors upload their images. Everything works fine, but in the end, the path to the image is something like this:

"/images\the-picture.jpg "

Even in the database (I'm using MongoDB), the path is saved like this:

imageurl: images\the-picture.jpg

I'm using this middleware to give the multer the proper filter:

const fileStorage = multer.diskStorage({
  destination: (req, file, cb) => {
    cb(null, "images/");
  },
  filename: (req, file, cb) => {
    cb(null, Math.round(Math.random() * 100000) + "-" + file.originalname);
  },
});

const fileFilter = (req, file, cb) => {
  if (
    file.mimetype === "image/png" ||
    file.mimetype === "image/jpg" ||
    file.mimetype === "image/jpeg"
  ) {
    cb(null, true);
  } else {
    cb(null, false);
  }
};

app.use(multer({ storage: fileStorage, fileFilter: fileFilter }).single("image"));

And in the controller I simply get the path to file:

const imageurl = image.path

Do I need to fix this URL problem or I can ignore this?