ValueCollection not saving values about laravel-attributes HOT 2 CLOSED

>>> $product = Modules\Catalog\Models\Product::find(2);
=> Modules\Catalog\Models\Product {#3154
     id: 2,
     sku: "test",
     name: "test",
     family_id: 1,
     product_brand_id: 1,
     product_state_id: 1,
     created_at: null,
     updated_at: null,
     deleted_at: null,
     product_segment_id: 1,
     product_manager: 1,
     photo: null,
     attribute-1: Rinvex\Attributes\Models\Type\Integer {#3184
       id: 1,
       content: 23,
       attribute_id: 21,
       entity_id: 2,
       entity_type: "Modules\Catalog\Models\Product",
       created_at: "2018-06-06 23:46:22",
       updated_at: "2018-06-06 23:46:22",
     },
     attribute-1-fixed: null,
     attribute-1-1: null,
     description: Rinvex\Attributes\Models\Type\Varchar {#3194
       id: 1,
       content: "descrição produto #2",
       attribute_id: 24,
       entity_id: 2,
       entity_type: "Modules\Catalog\Models\Product",
       created_at: null,
       updated_at: null,
     },
     file: null,
     file-1: null,
     option: App\Models\Option {#3216
       id: 1,
       content: 2,
       attribute_id: 27,
       entity_id: 2,
       entity_type: "Modules\Catalog\Models\Product",
       created_at: "2018-06-06 23:46:22",
       updated_at: "2018-06-06 23:46:22",
     },
     options: Rinvex\Attributes\Support\ValueCollection {#3228
       all: [
         App\Models\Options {#3229
           id: 1,
           content: 1,
           attribute_id: 29,
           entity_id: 2,
           entity_type: "Modules\Catalog\Models\Product",
           created_at: "2018-06-07 00:08:39",
           updated_at: "2018-06-07 00:08:39",
         },
       ],
     },
   }


>>> $product->options->push("2")
=> Illuminate\Support\Collection {#3077
     all: [
       "1",
       "2",
     ],
   }


>>> $product->options
=> Illuminate\Support\Collection {#3141
     all: [
       "1",
     ],
   }


>>> $product->save()
=> true

>>> $product->options
=> Illuminate\Support\Collection {#3225
     all: [
       "1",
     ],
   }