PDOException: SQLSTATE[42000]: Syntax error or access violation: 1055 'bdvberat.liste.liste_name' isn't in GROUP BY
 File=/var/www/vhosts/bdv-beratung.de/app/Models/MusterbriefListe.php
 Line=101
#0 [internal function]: PDO->prepare()
#1 [internal function]: Phalcon\Db\Adapter\Pdo\AbstractPdo->query()
#2 [internal function]: Phalcon\Mvc\Model\Query->executeSelect()
#3 /var/www/vhosts/bdv-beratung.de/app/Models/MusterbriefListe.php(101): Phalcon\Mvc\Model\Query->execute()
#4 /var/www/vhosts/bdv-beratung.de/app/Controllers/Web/ContentController.php(283): App\Models\MusterbriefListe::getMusterbriefListen()
#5 /var/www/vhosts/bdv-beratung.de/app/Controllers/Web/ContentController.php(109): App\Controllers\Web\ContentController->setViewModulVars()
#6 /var/www/vhosts/bdv-beratung.de/app/Controllers/Web/ContentController.php(58): App\Controllers\Web\ContentController->setView()
#7 [internal function]: App\Controllers\Web\ContentController->indexAction()
#8 [internal function]: Phalcon\Dispatcher\AbstractDispatcher->callActionMethod()
#9 [internal function]: Phalcon\Dispatcher\AbstractDispatcher->dispatch()
#10 /var/www/vhosts/bdv-beratung.de/httpdocs/index.php(62): Phalcon\Mvc\Application->handle()
#11 {main}