Exception (Unknown Property) 'yii\base\UnknownPropertyException' with message 'Getting unknown property: yii\web\DbSession::user_id' in /var/www/html/vendor/yiisoft/yii2/base/Component.php:143 Stack trace: #0 /var/www/html/frontend/config/main.php(100): yii\base\Component->__get('user_id') #1 [internal function]: {closure}(Object(yii\web\DbSession)) #2 /var/www/html/vendor/yiisoft/yii2/web/MultiFieldSession.php(104): call_user_func(Object(Closure), Object(yii\web\DbSession)) #3 /var/www/html/vendor/yiisoft/yii2/web/DbSession.php(169): yii\web\MultiFieldSession->composeFields('jpn0eraijc9s85r...', '__flash|a:0:{}') #4 [internal function]: yii\web\DbSession->writeSession('jpn0eraijc9s85r...', '__flash|a:0:{}') #5 /var/www/html/vendor/yiisoft/yii2/web/Session.php(174): session_write_close() #6 [internal function]: yii\web\Session->close() #7 {main}