diff -r a/typo3/sysext/install/Classes/Updates/SeparateSysHistoryFromSysLogUpdate.php b/typo3/sysext/install/Classes/Updates/SeparateSysHistoryFromSysLogUpdate.php
97,110c97,99
<         // update "modify" statements (= decoupling)
<         $connection = GeneralUtility::makeInstance(ConnectionPool::class)->getConnectionForTable('sys_history');
<         $queryBuilder = $connection->createQueryBuilder();
<         $rows = $queryBuilder
<             ->select('sys_history.uid AS history_uid', 'sys_history.history_data', 'sys_log.*')
<             ->from('sys_history')
<             ->leftJoin(
<                 'sys_history',
<                 'sys_log',
<                 'sys_log',
<                 $queryBuilder->expr()->eq('sys_history.sys_log_uid', $queryBuilder->quoteIdentifier('sys_log.uid'))
<             )
<             ->execute()
<             ->fetchAll();
---
>         $begin = 0;
>         $step = 1000;
>         while ($begin < $count) {
112,135c101,142
<         foreach ($rows as $row) {
<             $logData = $row['log_data'] !== null ? unserialize($row['log_data'], ['allowed_classes' => false]) : [];
<             $updateData = [
<                 'actiontype' => RecordHistoryStore::ACTION_MODIFY,
<                 'usertype' => 'BE',
<                 'userid' => $row['userid'],
<                 'sys_log_uid' => 0,
<                 'history_data' => json_encode($row['history_data'] !== null ? unserialize($row['history_data'], ['allowed_classes' => false]) : []),
<                 'originaluserid' => empty($logData['originalUser']) ? null : $logData['originalUser']
<             ];
<             $connection->update(
<                 'sys_history',
<                 $updateData,
<                 ['uid' => (int)$row['history_uid']],
<                 ['uid' => Connection::PARAM_INT]
<             );
<             // Store information about history entry in sys_log table
<             $logData['history'] = $row['history_uid'];
<             $connection->update(
<                 'sys_log',
<                 ['log_data' => serialize($logData)],
<                 ['uid' => (int)$row['uid']],
<                 ['uid' => Connection::PARAM_INT]
<             );
---
>             $queryBuilder = $connection->createQueryBuilder();
>             $queryBuilder = $queryBuilder
>                 ->select('sys_history.uid AS history_uid', 'sys_history.history_data', 'sys_log.*')
>                 ->from('sys_history')
>                 ->leftJoin(
>                     'sys_history',
>                     'sys_log',
>                     'sys_log',
>                     $queryBuilder->expr()->eq('sys_history.sys_log_uid', $queryBuilder->quoteIdentifier('sys_log.uid'))
>                 );
> 
>             $queryBuilder->setFirstResult($begin);
>             $queryBuilder->setMaxResults($step);
> 
>             $rows = $queryBuilder->execute()->fetchAll();
>             $begin += $step;
> 
>             foreach ($rows as $row) {
>                 $logData = $row['log_data'] !== null ? unserialize($row['log_data'], ['allowed_classes' => false]) : [];
>                 $updateData = [
>                     'actiontype' => RecordHistoryStore::ACTION_MODIFY,
>                     'usertype' => 'BE',
>                     'userid' => $row['userid'],
>                     'sys_log_uid' => 0,
>                     'history_data' => json_encode($row['history_data'] !== null ? unserialize($row['history_data'], ['allowed_classes' => false]) : []),
>                     'originaluserid' => empty($logData['originalUser']) ? null : $logData['originalUser']
>                 ];
>                 $connection->update(
>                     'sys_history',
>                     $updateData,
>                     ['uid' => (int)$row['history_uid']],
>                     ['uid' => Connection::PARAM_INT]
>                 );
>                 // Store information about history entry in sys_log table
>                 $logData['history'] = $row['history_uid'];
>                 $connection->update(
>                     'sys_log',
>                     ['log_data' => serialize($logData)],
>                     ['uid' => (int)$row['uid']],
>                     ['uid' => Connection::PARAM_INT]
>                 );
>             }