2017-08-31 06:04:31 [Waem7wpAAEEAABrw7GoAAACA] mw1270 hiwikiversity 1.30.0-wmf.16 exception ERROR: [Waem7wpAAEEAABrw7GoAAACA] /w/index.php?title=%E0%A4%B5%E0%A4%BF%E0%A4%B6%E0%A5%87%E0%A4%B7:%E0%A4%AA%E0%A5%81%E0%A4%A8%E0%A4%B0%E0%A5%8D%E0%A4%B8%E0%A5%8D%E0%A4%A5%E0%A4%BE%E0%A4%AA%E0%A4%A8&action=submit   UnexpectedValueException from line 170 of /srv/mediawiki/php-1.30.0-wmf.16/includes/user/UserGroupMembership.php: UserGroupMembership::insert() needs a positive user ID. Did you forget to add your User object to the database before calling addGroup()? {"exception_id":"Waem7wpAAEEAABrw7GoAAACA","caught_by":"mwe_handler"}
[Exception UnexpectedValueException] (/srv/mediawiki/php-1.30.0-wmf.16/includes/user/UserGroupMembership.php:170) UserGroupMembership::insert() needs a positive user ID. Did you forget to add your User object to the database before calling addGroup()?
  #0 /srv/mediawiki/php-1.30.0-wmf.16/includes/user/User.php(3441): UserGroupMembership->insert(boolean)
  #1 /srv/mediawiki/php-1.30.0-wmf.16/extensions/Flow/includes/TalkpageManager.php(263): User->addGroup(string)
  #2 /srv/mediawiki/php-1.30.0-wmf.16/extensions/Flow/container.php(1274): Flow\TalkpageManager->getTalkpageManager()
  #3 /srv/mediawiki/php-1.30.0-wmf.16/vendor/pimple/pimple/src/Pimple/Container.php(113): Closure$#148(Flow\Container)
  #4 /srv/mediawiki/php-1.30.0-wmf.16/extensions/Flow/includes/Container.php(48): Pimple\Container->offsetGet(string)
  #5 /srv/mediawiki/php-1.30.0-wmf.16/extensions/Flow/Hooks.php(1652): Flow\Container::get(string)
  #6 /srv/mediawiki/php-1.30.0-wmf.16/includes/Hooks.php(186): FlowHooks::onArticleUndelete(Title, boolean, string, integer, array)
  #7 /srv/mediawiki/php-1.30.0-wmf.16/includes/page/PageArchive.php(766): Hooks::run(string, array)
  #8 /srv/mediawiki/php-1.30.0-wmf.16/includes/page/PageArchive.php(444): PageArchive->undeleteRevisions(array, boolean, string)
  #9 /srv/mediawiki/php-1.30.0-wmf.16/includes/specials/SpecialUndelete.php(1135): PageArchive->undelete(array, string, array, boolean, User)
  #10 /srv/mediawiki/php-1.30.0-wmf.16/includes/specials/SpecialUndelete.php(201): SpecialUndelete->undelete()
  #11 /srv/mediawiki/php-1.30.0-wmf.16/includes/specialpage/SpecialPage.php(522): SpecialUndelete->execute(NULL)
  #12 /srv/mediawiki/php-1.30.0-wmf.16/includes/specialpage/SpecialPageFactory.php(578): SpecialPage->run(NULL)
  #13 /srv/mediawiki/php-1.30.0-wmf.16/includes/MediaWiki.php(287): SpecialPageFactory::executePath(Title, RequestContext)
  #14 /srv/mediawiki/php-1.30.0-wmf.16/includes/MediaWiki.php(848): MediaWiki->performRequest()
  #15 /srv/mediawiki/php-1.30.0-wmf.16/includes/MediaWiki.php(523): MediaWiki->main()
  #16 /srv/mediawiki/php-1.30.0-wmf.16/index.php(43): MediaWiki->run()
  #17 /srv/mediawiki/w/index.php(3): include(string)
  #18 {main}