At https://tools.wmflabs.org/zoranzoki21wiki I installed Duplicator extension for testing purposes and working on T212044. But when I want to test it, I get this:
```
[075522b861dc33588932ee2e] /zoranzoki21wiki/wiki/index.php?title=%D0%9F%D0%BE%D1%81%D0%B5%D0%B1%D0%BD%D0%BE:Duplicator Error from line 1373 of /data/project/zoranzoki21wiki/public_html/wiki/includes/page/WikiPage.php: Call to a member function getId() on null
Backtrace:
#0 /data/project/zoranzoki21wiki/public_html/wiki/includes/page/Article.php(2798): WikiPage->updateRevisionOn(Wikimedia\Rdbms\DatabaseMysqli, NULL, NULL, NULL)
#1 /data/project/zoranzoki21wiki/public_html/wiki/extensions/Duplicator/Duplicator.page.php(335): Article->updateRevisionOn(Wikimedia\Rdbms\DatabaseMysqli, NULL)
#2 /data/project/zoranzoki21wiki/public_html/wiki/extensions/Duplicator/Duplicator.page.php(115): SpecialDuplicator->duplicate(Title, Title, boolean)
#3 /data/project/zoranzoki21wiki/public_html/wiki/includes/specialpage/SpecialPage.php(569): SpecialDuplicator->execute(NULL)
#4 /data/project/zoranzoki21wiki/public_html/wiki/includes/specialpage/SpecialPageFactory.php(558): SpecialPage->run(NULL)
#5 /data/project/zoranzoki21wiki/public_html/wiki/includes/MediaWiki.php(288): MediaWiki\Special\SpecialPageFactory->executePath(Title, RequestContext)
#6 /data/project/zoranzoki21wiki/public_html/wiki/includes/MediaWiki.php(862): MediaWiki->performRequest()
#7 /data/project/zoranzoki21wiki/public_html/wiki/includes/MediaWiki.php(517): MediaWiki->main()
#8 /data/project/zoranzoki21wiki/public_html/wiki/index.php(42): MediaWiki->run()
#9 {main}
```
This happening and when I use fresh copy from gerrit and from my patch https://gerrit.wikimedia.org/r/#/c/mediawiki/extensions/Duplicator/+/481949/
**MediaWiki version:**
MediaWiki 1.33.0-alpha (311b203)
PHP 7.2.8-1+0~20180725124257.2+stretch~1.gbp571e56 (cgi-fcgi)
MariaDB 10.0.34-MariaDB
ICU 57.1