Unknown property error when upgrading to Craft 4

[watchwood]

I'm getting the following error when trying to migrate my web site from Craft 3 to Craft 4:

[yii\base\UnknownPropertyException] yii\base\UnknownPropertyException: Setting unknown property: nystudio107\seomatic\models\MetaScript::deprecated in /home/vagrant/code/vendor/yiisoft/yii2/base/Component.php:209
Stack trace:
#0 /home/vagrant/code/vendor/yiisoft/yii2/BaseYii.php(558): yii\base\Component->__set()
#1 /home/vagrant/code/vendor/yiisoft/yii2/base/BaseObject.php(107): yii\BaseYii::configure()
#2 /home/vagrant/code/vendor/craftcms/cms/src/base/Model.php(78): yii\base\BaseObject->__construct()
#3 /home/vagrant/code/vendor/nystudio107/craft-seomatic/src/models/MetaScript.php(95): craft\base\Model->__construct()
#4 /home/vagrant/code/vendor/nystudio107/craft-seomatic/src/models/MetaScriptContainer.php(154): nystudio107\seomatic\models\MetaScript::create()
#5 /home/vagrant/code/vendor/nystudio107/craft-seomatic/src/base/Container.php(45): nystudio107\seomatic\models\MetaScriptContainer->normalizeContainerData()
#6 /home/vagrant/code/vendor/nystudio107/craft-seomatic/src/models/MetaBundle.php(229): nystudio107\seomatic\base\Container::create()
#7 /home/vagrant/code/vendor/nystudio107/craft-seomatic/src/models/MetaBundle.php(144): nystudio107\seomatic\models\MetaBundle->normalizeMetaBundleData()
#8 /home/vagrant/code/vendor/nystudio107/craft-seomatic/src/services/MetaBundles.php(154): nystudio107\seomatic\models\MetaBundle::create()
#9 /home/vagrant/code/vendor/nystudio107/craft-seomatic/src/services/MetaContainers.php(504): nystudio107\seomatic\services\MetaBundles->getGlobalMetaBundle()
#10 /home/vagrant/code/vendor/nystudio107/craft-seomatic/src/twigextensions/SeomaticTwigExtension.php(58): nystudio107\seomatic\services\MetaContainers->loadGlobalMetaContainers()
#11 /home/vagrant/code/vendor/twig/twig/src/ExtensionSet.php(320): nystudio107\seomatic\twigextensions\SeomaticTwigExtension->getGlobals()
#12 /home/vagrant/code/vendor/twig/twig/src/Environment.php(783): Twig\ExtensionSet->getGlobals()
#13 /home/vagrant/code/vendor/twig/twig/src/Environment.php(796): Twig\Environment->getGlobals()
#14 /home/vagrant/code/vendor/twig/twig/src/Template.php(367): Twig\Environment->mergeGlobals()
#15 /home/vagrant/code/vendor/twig/twig/src/Template.php(379): Twig\Template->display()
#16 /home/vagrant/code/vendor/twig/twig/src/TemplateWrapper.php(40): Twig\Template->render()
#17 /home/vagrant/code/vendor/twig/twig/src/Environment.php(277): Twig\TemplateWrapper->render()
#18 /home/vagrant/code/vendor/craftcms/cms/src/web/View.php(482): Twig\Environment->render()
#19 /home/vagrant/code/vendor/craftcms/cms/src/web/View.php(535): craft\web\View->renderTemplate()
#20 /home/vagrant/code/vendor/craftcms/cms/src/web/TemplateResponseFormatter.php(57): craft\web\View->renderPageTemplate()
#21 /home/vagrant/code/vendor/yiisoft/yii2/web/Response.php(1100): craft\web\TemplateResponseFormatter->format()
#22 /home/vagrant/code/vendor/craftcms/cms/src/web/Response.php(337): yii\web\Response->prepare()
#23 /home/vagrant/code/vendor/yiisoft/yii2/web/Response.php(340): craft\web\Response->prepare()
#24 /home/vagrant/code/vendor/yiisoft/yii2/base/Application.php(390): yii\web\Response->send()
#25 /home/vagrant/code/public/index.php(23): yii\base\Application->run()
#26 {main} {"memory":6522480,"exception":"[object] (yii\base\UnknownPropertyException(code: 0): Setting unknown property: nystudio107\seomatic\models\MetaScript::deprecated at /home/vagrant/code/vendor/yiisoft/yii2/base/Component.php:209)"}

This is with CraftCMS 4.8.0 and Seomatic 4.0.42

[khalwat]

This is the wrong repository, this is the repository for the old deprecated Craft 2 SEOmatic plugin.

Regardless, I don't think you actually have SEOmatic 4.0.42 installed; try removing it from vendor/nystudio107/craft-seomatic/ and then do:

composer require nystudio107/craft-seomatic