{"action":"opened","issue":{"url":"https://api.github.com/repos/lazychaser/laravel-nestedset/issues/101","repository_url":"https://api.github.com/repos/lazychaser/laravel-nestedset","labels_url":"https://api.github.com/repos/lazychaser/laravel-nestedset/issues/101/labels{/name}","comments_url":"https://api.github.com/repos/lazychaser/laravel-nestedset/issues/101/comments","events_url":"https://api.github.com/repos/lazychaser/laravel-nestedset/issues/101/events","html_url":"https://github.com/lazychaser/laravel-nestedset/issues/101","id":147127726,"number":101,"title":"bug : Node must exists.","user":{"login":"amin101","id":14128415,"avatar_url":"https://avatars.githubusercontent.com/u/14128415?v=3","gravatar_id":"","url":"https://api.github.com/users/amin101","html_url":"https://github.com/amin101","followers_url":"https://api.github.com/users/amin101/followers","following_url":"https://api.github.com/users/amin101/following{/other_user}","gists_url":"https://api.github.com/users/amin101/gists{/gist_id}","starred_url":"https://api.github.com/users/amin101/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/amin101/subscriptions","organizations_url":"https://api.github.com/users/amin101/orgs","repos_url":"https://api.github.com/users/amin101/repos","events_url":"https://api.github.com/users/amin101/events{/privacy}","received_events_url":"https://api.github.com/users/amin101/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":0,"created_at":"2016-04-09T12:59:50Z","updated_at":"2016-04-09T12:59:50Z","closed_at":null,"body":"hi,thanks for great package.\r\nFirst node `_lft` is always `0` , so when i try to move  a node before or after first node , an exception throw:\r\n```php\r\nLogicException in NodeTrait.php line 1144: Node must exists.\r\n``` \r\nit's because of ` if ( ! $node->getLft() |....` \r\n"}}