**Setup**
- MediaWiki 1.31+
**Issue**
Delete old revisions
```[W0giZtMa0h6BH0P7VN1VMwAAAAA] /a/%E0%B8%9E%E0%B8%B4%E0%B9%80%E0%B8%A8%E0%B8%A9:MaintenanceShell Wikimedia\Rdbms\DBUnexpectedError from line 3692 of /home/bondinth/domains/bond.in.th/public_html/wiki/w/includes/libs/rdbms/database/Database.php: DeleteOldRevisions::doDelete: Implicit transaction already active (from Wikimedia\Rdbms\Database::query (LCStoreDB::get)).```
**Backtrace**
```
#0 /../w/maintenance/Maintenance.php(1337): Wikimedia\Rdbms\Database->begin(string)
#1 /../w/maintenance/deleteOldRevisions.php(48): Maintenance->beginTransaction(Wikimedia\Rdbms\DatabaseMysqli, string)
#2 /../w/maintenance/deleteOldRevisions.php(42): DeleteOldRevisions->doDelete(boolean, array)
#3 /../w/extensions/MaintenanceShell/includes/SpecialMaintenanceShell.php(161): DeleteOldRevisions->execute()
#4 /../w/extensions/MaintenanceShell/includes/SpecialMaintenanceShell.php(96): SpecialMaintenanceShell->mainshellExec(string, string)
#5 /../w/includes/htmlform/HTMLForm.php(660): SpecialMaintenanceShell->onSubmit(array, HTMLForm)
#6 /../w/includes/htmlform/HTMLForm.php(552): HTMLForm->trySubmit()
#7 /../w/includes/htmlform/HTMLForm.php(567): HTMLForm->tryAuthorizedSubmit()
#8 /../w/includes/specialpage/FormSpecialPage.php(155): HTMLForm->show()
#9 /../w/extensions/MaintenanceShell/includes/SpecialMaintenanceShell.php(21): FormSpecialPage->execute(NULL)
#10 /../w/includes/specialpage/SpecialPage.php(522): SpecialMaintenanceShell->execute(NULL)
#11 /../w/includes/specialpage/SpecialPageFactory.php(568): SpecialPage->run(NULL)
#12 /../w/includes/MediaWiki.php(288): SpecialPageFactory::executePath(Title, RequestContext)
#13 /../w/includes/MediaWiki.php(861): MediaWiki->performRequest()
#14 /../w/includes/MediaWiki.php(524): MediaWiki->main()
#15 /../w/index.php(42): MediaWiki->run()
#16 {main}
```
Reported twice [[ https://www.mediawiki.org/wiki/Topic:Ugsxngcpg1nnr0nd | here ]] and [[ https://www.mediawiki.org/wiki/Topic:Uoyvn1fdrxthjeyq | there ]].