tag-it input store only last value in DB laravel 5.4

i am using Jquery Tag-it. When i pass tag-it values to controller and check it by var_dump(); all the values post perfectly but the problem i that when it pass to DB it will store only last value .. please help me out

<input type="text" value="" data-role="tagsinput" id="tags" name="wish-tags" class="form-control">

Controller

$wishlist = Wishlist::firstOrNew(['user_id' => Auth::user()->id]);
        if (!empty($wishlist)) {
            $locations = $request->input('wish-tags');
            //var_dump($locations); exit();
            foreach (explode(",", $locations) as $location) {

                $wishlist->update([
                    'user_id' => Auth::user()->id,
                    'locations' => $location,

                ]);
            }
        }

via Jamal Ahmad