Update table in Polymorphic Relation in laravel - eloquent

Question

I am working with laravel5.4. I have used Polymorphic relation for image upload.
So I have created table as images.
image table :
In image model I have created function for relation that looks like below.
Image model :
public function imageInfo()
{
return $this->morphTo();
}
In ticket model I have created function like below
Ticket model :
public function images()
{
return $this->morphMany('App\Models\Image\Image', 'imageInfo');
}
In ticket controller for storing image I have create functionality like :
if($request->file('file') != "")
{
$createPath = public_path('images/upload/ticket');
if(!File::exists($createPath.'/'.$ticket->id))
{
File::makeDirectory($createPath.'/'.$ticket->id,0775,true);
}
$destination_path = public_path('images/upload/ticket/'.$ticket->id);
$files = $request->file('file');
foreach ($files as $file) {
$image = new Image;
$image->name = $file->getClientOriginalName();
$image->type = $file->getClientMimeType();
if($ticket_info->images()->save($image))
{
$file->move($destination_path,$file->getClientOriginalName());
}
}
}
It works perfect for storing image in database. But I want to update this table so according to ticket_id.
So how can I update this table using sync() method or any other option?