Relationship not saving on update

Forms\Components\Select::make('locations')
                                        ->multiple()
                                        ->relationship('locations', 'name')
                                        ->preload()
                                        ->searchable()
                                        ->createOptionForm([
                                            Forms\Components\Select::make('resort_id')
                                                ->relationship('resort', 'name')
                                                ->required()
                                                ->preload()
                                                ->searchable(),
                                            Forms\Components\TextInput::make('name')
                                                ->required()
                                                ->maxLength(255),
                                            Forms\Components\TextInput::make('slug')
                                                ->required()
                                                ->maxLength(255),
                                            Forms\Components\TextInput::make('address')
                                                ->maxLength(255),
                                            Forms\Components\TextInput::make('maps_url')
                                                ->url()
                                                ->maxLength(255),
                                            Forms\Components\TextInput::make('what3words')
                                                ->maxLength(255),
                                        ]),

    /**
     * The locations that belong to the product.
     *
     * @return BelongsToMany
     */
    public function locations(): BelongsToMany
    {
        return $this->belongsToMany(Location::class);
    }