Update/Replace multiple image In multer

how to update /replace image in Multer

My upload codes work fine

```js
var multer = require('multer');
var storage = multer.diskStorage({
destination:function(req,file,cb){
cb(null,"/home/plexihea/web/plexihealth.com/public_html/doctor/images/clinic/")
},
filename: function(req,file,cb){
cb(null,Date.now() + file.originalname);
}
});
var upload = multer({ storage:storage });

app.route('/add_user')
.post(upload.any(),user.create_a_user);
```

same thing I did it to update
When i update same image which is store in the storage
i got error " Cannot read property 'filename' of undefined
"
i

Start with the shown app.route('/add_user') handler, upload.any(), and user.create_a_user callback, then reproduce the update request that raises "Cannot read property 'filename' of undefined." Inspect the uploaded-file data and define the expected behavior for replacing an existing image before determining what change and verification are needed.

Written by the indexing model from the issue text.