I am trying to upgrade from ojs-2.4.8-5 to ojs-3.2.1-4 PHP 7.4.9 MYSQL 5.7.31
upgradation is almost complete but following error appear in php log
PHP Notice: unserialize(): Error at offset 0 of 29 bytes in D:\wamp64\www\ojsOldtoNew\lib\pkp\classes\db\DAO.inc.php on line 357
[05-Nov-2021 20:28:28 Asia/Kolkata] PHP Stack trace:
[05-Nov-2021 20:28:28 Asia/Kolkata] PHP 1. {main}() D:\wamp64\www\ojsOldtoNew\index.php:0
[05-Nov-2021 20:28:28 Asia/Kolkata] PHP 2. Application->execute() D:\wamp64\www\ojsOldtoNew\index.php:68
[05-Nov-2021 20:28:28 Asia/Kolkata] PHP 3. Dispatcher->dispatch() D:\wamp64\www\ojsOldtoNew\lib\pkp\classes\core\PKPApplication.inc.php:281
[05-Nov-2021 20:28:28 Asia/Kolkata] PHP 4. PageRouter->route() D:\wamp64\www\ojsOldtoNew\lib\pkp\classes\core\Dispatcher.inc.php:143
[05-Nov-2021 20:28:28 Asia/Kolkata] PHP 5. PageRouter->_authorizeInitializeAndCallRequest() D:\wamp64\www\ojsOldtoNew\lib\pkp\classes\core\PKPPageRouter.inc.php:231
[05-Nov-2021 20:28:28 Asia/Kolkata] PHP 6. InstallHandler->installUpgrade() D:\wamp64\www\ojsOldtoNew\lib\pkp\classes\core\PKPRouter.inc.php:391
[05-Nov-2021 20:28:28 Asia/Kolkata] PHP 7. UpgradeForm->execute() D:\wamp64\www\ojsOldtoNew\lib\pkp\pages\install\InstallHandler.inc.php:106
[05-Nov-2021 20:28:28 Asia/Kolkata] PHP 8. Upgrade->execute() D:\wamp64\www\ojsOldtoNew\lib\pkp\classes\install\form\UpgradeForm.inc.php:42
[05-Nov-2021 20:28:28 Asia/Kolkata] PHP 9. Upgrade->executeInstaller() D:\wamp64\www\ojsOldtoNew\lib\pkp\classes\install\Installer.inc.php:186
[05-Nov-2021 20:28:28 Asia/Kolkata] PHP 10. Upgrade->executeAction() D:\wamp64\www\ojsOldtoNew\lib\pkp\classes\install\Installer.inc.php:263
[05-Nov-2021 20:28:28 Asia/Kolkata] PHP 11. Upgrade->setFileName() D:\wamp64\www\ojsOldtoNew\lib\pkp\classes\install\Installer.inc.php:417
[05-Nov-2021 20:28:28 Asia/Kolkata] PHP 12. SubmissionFileDAO->updateObject() D:\wamp64\www\ojsOldtoNew\classes\install\Upgrade.inc.php:1025
[05-Nov-2021 20:28:28 Asia/Kolkata] PHP 13. SubmissionFileDAODelegate->updateObject() D:\wamp64\www\ojsOldtoNew\lib\pkp\classes\submission\SubmissionFileDAO.inc.php:391
[05-Nov-2021 20:28:28 Asia/Kolkata] PHP 14. SubmissionFile->getFilePath() D:\wamp64\www\ojsOldtoNew\lib\pkp\classes\submission\SubmissionFileDAODelegate.inc.php:191
[05-Nov-2021 20:28:28 Asia/Kolkata] PHP 15. SubmissionDAO->getById() D:\wamp64\www\ojsOldtoNew\lib\pkp\classes\submission\SubmissionFile.inc.php:492
[05-Nov-2021 20:28:28 Asia/Kolkata] PHP 16. SubmissionDAO->_fromRow() D:\wamp64\www\ojsOldtoNew\lib\pkp\classes\db\SchemaDAO.inc.php:54
[05-Nov-2021 20:28:28 Asia/Kolkata] PHP 17. APP\Services\PublicationService->getMany() D:\wamp64\www\ojsOldtoNew\lib\pkp\classes\submission\PKPSubmissionDAO.inc.php:91
[05-Nov-2021 20:28:28 Asia/Kolkata] PHP 18. DAOResultFactory->toIterator() D:\wamp64\www\ojsOldtoNew\lib\pkp\classes\services\PKPPublicationService.inc.php:80
[05-Nov-2021 20:28:28 Asia/Kolkata] PHP 19. DAOResultIterator->__construct() D:\wamp64\www\ojsOldtoNew\lib\pkp\classes\db\DAOResultFactory.inc.php:231
[05-Nov-2021 20:28:28 Asia/Kolkata] PHP 20. DAOResultFactory->next() D:\wamp64\www\ojsOldtoNew\lib\pkp\classes\db\DAOResultIterator.inc.php:33
[05-Nov-2021 20:28:28 Asia/Kolkata] PHP 21. PublicationDAO->_fromRow() D:\wamp64\www\ojsOldtoNew\lib\pkp\classes\db\DAOResultFactory.inc.php:108
[05-Nov-2021 20:28:28 Asia/Kolkata] PHP 22. PublicationDAO->_fromRow() D:\wamp64\www\ojsOldtoNew\classes\publication\PublicationDAO.inc.php:40
[05-Nov-2021 20:28:28 Asia/Kolkata] PHP 23. PublicationDAO->_fromRow() D:\wamp64\www\ojsOldtoNew\lib\pkp\classes\publication\PKPPublicationDAO.inc.php:50
[05-Nov-2021 20:28:28 Asia/Kolkata] PHP 24. PublicationDAO->convertFromDB() D:\wamp64\www\ojsOldtoNew\lib\pkp\classes\db\SchemaDAO.inc.php:252
[05-Nov-2021 20:28:28 Asia/Kolkata] PHP 25. unserialize() D:\wamp64\www\ojsOldtoNew\lib\pkp\classes\db\DAO.inc.php:357
[05-Nov-2021 20:28:38 Asia/Kolkata] ojs2: Unknown locale component