TYPO3 Core

I've updated the TYPO3 Core from 6.2.0beta7 to 6.2.0rc2 and now I get this error when trying to access any module

Fatal error: Can't inherit abstract function TYPO3\CMS\Extbase\Persistence\ObjectMonitoringInterface::_memorizeCleanState() (previously declared abstract in TYPO3\CMS\Extbase\DomainObject\DomainObjectInterface) in .../typo3_src-6.2.0rc2/typo3/sysext/extbase/Classes/DomainObject/AbstractDomainObject.php on line 35 Call Stack: 0.0004 671888 1. {main}() .../typo3_src-6.2.0rc2/typo3/mod.php:0 1.1854 14002232 2. TYPO3\CMS\Extbase\Core\ModuleRunner->callModule() .../typo3_src-6.2.0rc2/typo3/mod.php:51 1.1965 14086112 3. TYPO3\CMS\Extbase\Core\Bootstrap->run() .../typo3_src-6.2.0rc2/typo3/sysext/extbase/Classes/Core/ModuleRunner.php:81 3.2445 38478064 4. TYPO3\CMS\Extbase\Core\Bootstrap->handleRequest() .../typo3_src-6.2.0rc2/typo3/sysext/extbase/Classes/Core/Bootstrap.php:197 3.3591 39185536 5. TYPO3\CMS\Extbase\Mvc\Web\BackendRequestHandler->handleRequest() .../typo3_src-6.2.0rc2/typo3/sysext/extbase/Classes/Core/Bootstrap.php:208 3.3902 39683408 6. TYPO3\CMS\Extbase\Mvc\Dispatcher->dispatch() .../typo3_src-6.2.0rc2/typo3/sysext/extbase/Classes/Mvc/Web/BackendRequestHandler.php:47 3.3902 39683488 7. TYPO3\CMS\Extbase\Mvc\Dispatcher->resolveController() .../typo3_src-6.2.0rc2/typo3/sysext/extbase/Classes/Mvc/Dispatcher.php:81 3.3902 39683672 8. TYPO3\CMS\Extbase\Object\ObjectManager->get() .../typo3_src-6.2.0rc2/typo3/sysext/extbase/Classes/Mvc/Dispatcher.php:100 3.3902 39683984 9. TYPO3\CMS\Extbase\Object\Container\Container->getInstance() .../typo3_src-6.2.0rc2/typo3/sysext/extbase/Classes/Object/ObjectManager.php:108 3.3902 39683984 10. TYPO3\CMS\Extbase\Object\Container\Container->getInstanceInternal() .../typo3_src-6.2.0rc2/typo3/sysext/extbase/Classes/Object/Container/Container.php:122 4.0468 40439672 11. TYPO3\CMS\Extbase\Object\Container\Container->injectDependencies() .../typo3_src-6.2.0rc2/typo3/sysext/extbase/Classes/Object/Container/Container.php:176 5.2542 41002872 12. TYPO3\CMS\Extbase\Object\Container\Container->getInstanceInternal() .../typo3_src-6.2.0rc2/typo3/sysext/extbase/Classes/Object/Container/Container.php:232 5.3914 41059384 13. TYPO3\CMS\Extbase\Object\Container\Container->injectDependencies() .../typo3_src-6.2.0rc2/typo3/sysext/extbase/Classes/Object/Container/Container.php:176 5.5690 41128088 14. TYPO3\CMS\Extbase\Object\Container\Container->getInstanceInternal() .../typo3_src-6.2.0rc2/typo3/sysext/extbase/Classes/Object/Container/Container.php:232 5.5856 41327968 15. TYPO3\CMS\Extbase\Object\Container\Container->injectDependencies() .../typo3_src-6.2.0rc2/typo3/sysext/extbase/Classes/Object/Container/Container.php:176 6.0322 41656488 16. TYPO3\CMS\Extbase\Object\Container\Container->getInstanceInternal() .../typo3_src-6.2.0rc2/typo3/sysext/extbase/Classes/Object/Container/Container.php:232 6.1665 41834856 17. TYPO3\CMS\Extbase\Object\Container\Container->injectDependencies() .../typo3_src-6.2.0rc2/typo3/sysext/extbase/Classes/Object/Container/Container.php:176 6.1668 41836272 18. TYPO3\CMS\Extbase\Object\Container\Container->getInstanceInternal() .../typo3_src-6.2.0rc2/typo3/sysext/extbase/Classes/Object/Container/Container.php:232 6.3812 41952568 19. TYPO3\CMS\Extbase\Object\Container\Container->injectDependencies() .../typo3_src-6.2.0rc2/typo3/sysext/extbase/Classes/Object/Container/Container.php:176 6.4748 42043128 20. TYPO3\CMS\Extbase\Object\Container\Container->getInstanceInternal() .../typo3_src-6.2.0rc2/typo3/sysext/extbase/Classes/Object/Container/Container.php:232 6.4860 42074136 21. TYPO3\CMS\Extbase\Object\Container\Container->injectDependencies() .../typo3_src-6.2.0rc2/typo3/sysext/extbase/Classes/Object/Container/Container.php:176 6.4992 42131856 22. TYPO3\CMS\Extbase\Object\Container\Container->getInstanceInternal() .../typo3_src-6.2.0rc2/typo3/sysext/extbase/Classes/Object/Container/Container.php:232 6.5105 42237760 23. TYPO3\CMS\Extbase\Object\Container\Container->instanciateObject() .../typo3_src-6.2.0rc2/typo3/sysext/extbase/Classes/Object/Container/Container.php:175 6.5106 42239136 24. call_user_func_array() .../typo3_src-6.2.0rc2/typo3/sysext/extbase/Classes/Object/Container/Container.php:204 6.5106 42239624 25. TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance() .../typo3_src-6.2.0rc2/typo3/sysext/extbase/Classes/Object/Container/Container.php:0 6.5107 42240600 26. TYPO3\CMS\Core\Utility\GeneralUtility::instantiateClass() .../typo3_src-6.2.0rc2/typo3/sysext/core/Classes/Utility/GeneralUtility.php:4261 6.5107 42241488 27. TYPO3\CMS\Extensionmanager\Utility\Repository\Helper->__construct() .../typo3_src-6.2.0rc2/typo3/sysext/core/Classes/Utility/GeneralUtility.php:4279 6.5799 42284312 28. TYPO3\CMS\Extbase\Persistence\Repository->findByUid() .../typo3_src-6.2.0rc2/typo3/sysext/extensionmanager/Classes/Utility/Repository/Helper.php:85 6.5799 42284312 29. TYPO3\CMS\Extbase\Persistence\Repository->findByIdentifier() .../typo3_src-6.2.0rc2/typo3/sysext/extbase/Classes/Persistence/Repository.php:194 6.5799 42284312 30. TYPO3\CMS\Extbase\Persistence\Repository->createQuery() .../typo3_src-6.2.0rc2/typo3/sysext/extbase/Classes/Persistence/Repository.php:222 6.5799 42284312 31. TYPO3\CMS\Extbase\Persistence\Generic\PersistenceManager->createQueryForType() .../typo3_src-6.2.0rc2/typo3/sysext/extbase/Classes/Persistence/Repository.php:265 6.5799 42284312 32. TYPO3\CMS\Extbase\Persistence\Generic\QueryFactory->create() .../typo3_src-6.2.0rc2/typo3/sysext/extbase/Classes/Persistence/Generic/PersistenceManager.php:185 6.9901 42533240 33. TYPO3\CMS\Extbase\Persistence\Generic\Mapper\DataMapper->getDataMap() .../typo3_src-6.2.0rc2/typo3/sysext/extbase/Classes/Persistence/Generic/QueryFactory.php:64 6.9901 42533240 34. TYPO3\CMS\Extbase\Persistence\Generic\Mapper\DataMapFactory->buildDataMap() .../typo3_src-6.2.0rc2/typo3/sysext/extbase/Classes/Persistence/Generic/Mapper/DataMapper.php:546 6.9915 42532376 35. TYPO3\CMS\Extbase\Persistence\Generic\Mapper\DataMapFactory->buildDataMapInternal() .../typo3_src-6.2.0rc2/typo3/sysext/extbase/Classes/Persistence/Generic/Mapper/DataMapFactory.php:85 6.9915 42532456 36. class_exists() .../typo3_src-6.2.0rc2/typo3/sysext/extbase/Classes/Persistence/Generic/Mapper/DataMapFactory.php:101 6.9915 42533056 37. TYPO3\CMS\Core\Core\ClassLoader->loadClass() .../typo3_src-6.2.0rc2/typo3/sysext/core/Classes/Core/ClassLoader.php:0 7.0887 42584848 38. require_once('.../typo3_src-6.2.0rc2/typo3/sysext/extensionmanager/Classes/Domain/Model/Repository.php') .../typo3_src-6.2.0rc2/typo3/sysext/core/Classes/Core/ClassLoader.php:189 7.0887 42585424 39. TYPO3\CMS\Core\Core\ClassLoader->loadClass() .../typo3_src-6.2.0rc2/typo3/sysext/core/Classes/Core/ClassLoader.php:0 7.2924 42591200 40. require_once('.../typo3_src-6.2.0rc2/typo3/sysext/extbase/Classes/DomainObject/AbstractEntity.php') .../typo3_src-6.2.0rc2/typo3/sysext/core/Classes/Core/ClassLoader.php:189 7.2924 42591800 41. TYPO3\CMS\Core\Core\ClassLoader->loadClass() .../typo3_src-6.2.0rc2/typo3/sysext/core/Classes/Core/ClassLoader.php:0 7.3649 42695136 42. require_once('.../typo3_src-6.2.0rc2/typo3/sysext/extbase/Classes/DomainObject/AbstractDomainObject.php') .../typo3_src-6.2.0rc2/typo3/sysext/core/Classes/Core/ClassLoader.php:189