Problème après migration

[Mutig44]

Bonjour,

Suite à une migration de Joomla! 2.5.28 vers la version 3.4.8 je n'ai plus accès à l'admin.
J'ai le message suivant :


jos-Warning: exception 'RuntimeException' with message 'Unknown column 'header' in 'field list' SQL=SELECT `new_url`,`header`,`published` FROM `PLO_redirect_links` WHERE `old_url` = 'http://monsite/administration/' LIMIT 0, 1' in /var/www/clients/client11/web17/web/libraries/joomla/database/driver/mysqli.php:610 Stack trace: #0 /var/www/clients/client11/web17/web/libraries/joomla/database/driver.php(1279): JDatabaseDriverMysqli->execute() #1 /var/www/clients/client11/web17/web/plugins/system/redirect/redirect.php(86): JDatabaseDriver->loadObject() #2 [internal function]: PlgSystemRedirect::handleError(Object(JException)) #3 /var/www/clients/client11/web17/web/libraries/joomla/error/error.php(765): call_user_func(Array, Object(JException)) #4 [internal function]: JError::handleCallback(Object(JException), Array) #5 /var/www/clients/client11/web17/web/libraries/joomla/error/error.php(214): call_user_func_array(Array, Array) #6 /var/www/clients/client11/web17/web/libraries/joomla/error/error.php(176): JError::throwError(Object(JException)) #7 /var/www/clients/client11/web17/web/libraries/joomla/error/error.php(251): JError::raise(1, 404, 'Article non tro...', NULL, true) #8 /var/www/clients/client11/web17/web/components/com_content/models/article.php(163): JError::raiseError(404, 'Article non tro...') #9 /var/www/clients/client11/web17/web/libraries/joomla/application/component/view.php(386): ContentModelArticle->getItem() #10 /var/www/clients/client11/web17/web/components/com_content/views/article/view.html.php(42): JView->get('Item') #11 /var/www/clients/client11/web17/web/libraries/joomla/application/component/controller.php(722): ContentViewArticle->display() #12 /var/www/clients/client11/web17/web/components/com_content/controller.php(104): JController->display(true, Array) #13 /var/www/clients/client11/web17/web/libraries/joomla/application/component/controller.php(761): ContentController->display() #14 /var/www/clients/client11/web17/web/components/com_content/content.php(38): JController->execute(NULL) #15 /var/www/clients/client11/web17/web/libraries/cms/component/helper.php(392): require_once('/var/www/client...') #16 /var/www/clients/client11/web17/web/libraries/cms/component/helper.php(372): JComponentHelper::executeComponent('/var/www/client...') #17 /var/www/clients/client11/web17/web/libraries/cms/application/site.php(191): JComponentHelper::renderComponent('com_content') #18 /var/www/clients/client11/web17/web/libraries/cms/application/site.php(230): JApplicationSite->dispatch() #19 /var/www/clients/client11/web17/web/libraries/cms/application/cms.php(252): JApplicationSite->doExecute() #20 /var/www/clients/client11/web17/web/index.php(45): JApplicationCms->execute() #21 {main}

JApplicationCms -> execute() @ /var/www/clients/client11/web17/web/index.php:45
JApplicationSite -> doExecute() @ /var/www/clients/client11/web17/web/libraries/cms/application/cms.php:252
JApplicationSite -> dispatch() @ /var/www/clients/client11/web17/web/libraries/cms/application/site.php:230
JComponentHelper :: renderComponent() @ /var/www/clients/client11/web17/web/libraries/cms/application/site.php:191
JComponentHelper :: executeComponent() @ /var/www/clients/client11/web17/web/libraries/cms/component/helper.php:372
require_once() @ /var/www/clients/client11/web17/web/libraries/cms/component/helper.php:392
JController -> execute() @ /var/www/clients/client11/web17/web/components/com_content/content.php:38
ContentController -> display() @ /var/www/clients/client11/web17/web/libraries/joomla/application/component/controller.php:761
JController -> display() @ /var/www/clients/client11/web17/web/components/com_content/controller.php:104
ContentViewArticle -> display() @ /var/www/clients/client11/web17/web/libraries/joomla/application/component/controller.php:722
JError :: raiseWarning() @ /var/www/clients/client11/web17/web/components/com_content/views/article/view.html.php:50
JError :: raise() @ /var/www/clients/client11/web17/web/libraries/joomla/error/error.php:276

J'ai tenté sans succès la méthode suivante vue à plusieurs reprises:

ALTER TABLE `PLO_redirect_links` ADD header smallint(3) NOT NULL DEFAULT 301;
ALTER TABLE `PLO_redirect_links` MODIFY new_url varchar(255);

Si qqu'un a une idée je suis preneur !
Bonne journée.
Mutig