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Error

JDatabaseExceptionExecuting: Unknown column 'a.xreference' in 'field list' in C:\xampp\htdocs\gadmcpichincha\libraries\joomla\database\driver\mysqli.php:668 Stack trace: #0 C:\xampp\htdocs\gadmcpichincha\libraries\joomla\database\driver.php(1662): JDatabaseDriverMysqli->execute() #1 C:\xampp\htdocs\gadmcpichincha\components\com_content\models\article.php(151): JDatabaseDriver->loadObject() #2 C:\xampp\htdocs\gadmcpichincha\libraries\src\MVC\View\HtmlView.php(425): ContentModelArticle->getItem() #3 C:\xampp\htdocs\gadmcpichincha\components\com_content\views\article\view.html.php(42): Joomla\CMS\MVC\View\HtmlView->get('Item') #4 C:\xampp\htdocs\gadmcpichincha\libraries\src\MVC\Controller\BaseController.php(664): ContentViewArticle->display() #5 C:\xampp\htdocs\gadmcpichincha\components\com_content\controller.php(118): Joomla\CMS\MVC\Controller\BaseController->display(true, Array) #6 C:\xampp\htdocs\gadmcpichincha\libraries\src\MVC\Controller\BaseController.php(702): ContentController->display() #7 C:\xampp\htdocs\gadmcpichincha\components\com_content\content.php(43): Joomla\CMS\MVC\Controller\BaseController->execute('') #8 C:\xampp\htdocs\gadmcpichincha\libraries\src\Component\ComponentHelper.php(402): require_once('C:\\xampp\\htdocs...') #9 C:\xampp\htdocs\gadmcpichincha\libraries\src\Component\ComponentHelper.php(377): Joomla\CMS\Component\ComponentHelper::executeComponent('C:\\xampp\\htdocs...') #10 C:\xampp\htdocs\gadmcpichincha\libraries\src\Application\SiteApplication.php(194): Joomla\CMS\Component\ComponentHelper::renderComponent('com_content') #11 C:\xampp\htdocs\gadmcpichincha\libraries\src\Application\SiteApplication.php(233): Joomla\CMS\Application\SiteApplication->dispatch() #12 C:\xampp\htdocs\gadmcpichincha\libraries\src\Application\CMSApplication.php(225): Joomla\CMS\Application\SiteApplication->doExecute() #13 C:\xampp\htdocs\gadmcpichincha\index.php(49): Joomla\CMS\Application\CMSApplication->execute() #14 {main}