[{exception_id}] {exception_url} MediaWiki\Storage\IncompleteRevisionException from line 262 of /srv/mediawiki/php-1.31.0-wmf.16/includes/Storage/RevisionStore.php: comment must not be NULL!
#0 /srv/mediawiki/php-1.31.0-wmf.16/includes/Storage/RevisionStore.php(365): MediaWiki\Storage\RevisionStore->failOnNull(NULL, string) #1 /srv/mediawiki/php-1.31.0-wmf.16/includes/Revision.php(1024): MediaWiki\Storage\RevisionStore->insertRevisionOn(MediaWiki\Storage\MutableRevisionRecord, Wikimedia\Rdbms\DatabaseMysqli) #2 /srv/mediawiki/php-1.31.0-wmf.16/includes/page/WikiPage.php(1765): Revision->insertOn(Wikimedia\Rdbms\DatabaseMysqli) #3 /srv/mediawiki/php-1.31.0-wmf.16/includes/page/WikiPage.php(1668): WikiPage->doModify(WikitextContent, integer, User, NULL, array) #4 /srv/mediawiki/php-1.31.0-wmf.16/extensions/Flow/includes/Import/OptInController.php(242): WikiPage->doEditContent(WikitextContent, NULL, integer, boolean, User) #5 /srv/mediawiki/php-1.31.0-wmf.16/extensions/Flow/includes/Import/OptInController.php(560): Flow\Import\OptInController->createRevision(Title, string, NULL) #6 /srv/mediawiki/php-1.31.0-wmf.16/extensions/Flow/includes/Import/OptInController.php(579): Flow\Import\OptInController->editWikitextContent(Title, NULL, Closure$Flow\Import\OptInController::addCurrentTemplate;3395, string) #7 /srv/mediawiki/php-1.31.0-wmf.16/extensions/Flow/includes/Import/OptInController.php(111): Flow\Import\OptInController->addCurrentTemplate(Title, Title) #8 /srv/mediawiki/php-1.31.0-wmf.16/extensions/Flow/includes/Import/OptInUpdate.php(50): Flow\Import\OptInController->disable(Title) #9 /srv/mediawiki/php-1.31.0-wmf.16/includes/deferred/DeferredUpdates.php(259): Flow\Import\OptInUpdate->doUpdate() #10 /srv/mediawiki/php-1.31.0-wmf.16/includes/deferred/DeferredUpdates.php(210): DeferredUpdates::runUpdate(Flow\Import\OptInUpdate, Wikimedia\Rdbms\LBFactoryMulti, string, integer) #11 /srv/mediawiki/php-1.31.0-wmf.16/includes/deferred/DeferredUpdates.php(131): DeferredUpdates::execute(array, string, integer) #12 /srv/mediawiki/php-1.31.0-wmf.16/includes/MediaWiki.php(900): DeferredUpdates::doUpdates(string) #13 /srv/mediawiki/php-1.31.0-wmf.16/includes/MediaWiki.php(720): MediaWiki->restInPeace(string, boolean) #14 [internal function]: Closure$MediaWiki::doPostOutputShutdown() #15 {main}