Use a per-version upgrade override

See https://www.woltlab.com/community/thread/308245-pr%C3%BCfung-auf-systemkompatibilit%C3%A4t-fehlerhaft-bei-upgrade-5-4-6-0/

Author: dtdesign

wcfsetup/install/files/lib/acp/form/PackageEnableUpgradeOverrideForm.class.php

@@ -365,15 +365,24 @@ public function save()
     {
         AbstractForm::save();
 
+        $overrideKey = \sprintf(
+            "%s\0upgradeOverride_%s",
+            PackageUpdateServer::class,
+            WCF::AVAILABLE_UPGRADE_VERSION,
+        );
+
         $formData = $this->form->getData();
         if ($formData['data']['enable']) {
             $this->isEnabled = true;
-            RegistryHandler::getInstance()->set('com.woltlab.wcf', PackageUpdateServer::class . "\0upgradeOverride", \TIME_NOW);
+            RegistryHandler::getInstance()->set('com.woltlab.wcf', $overrideKey, \TIME_NOW);
         } else {
             $this->isEnabled = false;
-            RegistryHandler::getInstance()->delete('com.woltlab.wcf', PackageUpdateServer::class . "\0upgradeOverride");
+            RegistryHandler::getInstance()->delete('com.woltlab.wcf', $overrideKey);
         }
 
+        // Clear the legacy override.
+        RegistryHandler::getInstance()->delete('com.woltlab.wcf', PackageUpdateServer::class . "\0upgradeOverride");
+
         PackageUpdateServer::resetAll();
 
         $this->form->cleanup();

wcfsetup/install/files/lib/data/package/update/server/PackageUpdateServer.class.php

@@ -420,14 +420,19 @@ final public static function isUpgradeOverrideEnabled()
             return false;
         }
 
-        $override = RegistryHandler::getInstance()->get('com.woltlab.wcf', self::class . "\0upgradeOverride");
+        $overrideKey = \sprintf(
+            "%s\0upgradeOverride_%s",
+            self::class,
+            WCF::AVAILABLE_UPGRADE_VERSION,
+        );
+        $override = RegistryHandler::getInstance()->get('com.woltlab.wcf', $overrideKey);
 
         if (!$override) {
             return false;
         }
 
         if ($override < TIME_NOW - 86400) {
-            RegistryHandler::getInstance()->delete('com.woltlab.wcf', self::class . "\0upgradeOverride");
+            RegistryHandler::getInstance()->delete('com.woltlab.wcf', $overrideKey);
 
             // Clear package list cache to actually stop the upgrade from happening.
             self::resetAll();