From WMF logs:
```
Duplicate entry 'ext.uls.pt-vector|en' for key 'PRIMARY' (10.64.48.35)
RuntimeException
#0 /srv/mediawiki/php-1.35.0-wmf.20/includes/libs/rdbms/database/Database.php(1587): Wikimedia\Rdbms\Database->getQueryExceptionAndLog(string, integer, string, string)
#1 /srv/mediawiki/php-1.35.0-wmf.20/includes/libs/rdbms/database/Database.php(1166): Wikimedia\Rdbms\Database->reportQueryError(string, integer, string, string, boolean)
#2 /srv/mediawiki/php-1.35.0-wmf.20/includes/libs/rdbms/database/Database.php(2178): Wikimedia\Rdbms\Database->query(string, string)
#3 /srv/mediawiki/php-1.35.0-wmf.20/includes/libs/rdbms/database/DBConnRef.php(68): Wikimedia\Rdbms\Database->insert(string, array, string)
#4 /srv/mediawiki/php-1.35.0-wmf.20/includes/libs/rdbms/database/DBConnRef.php(378): Wikimedia\Rdbms\DBConnRef->__call(string, array)
#5 /srv/mediawiki/php-1.35.0-wmf.20/includes/resourceloader/dependencystore/SqlModuleDependencyStore.php(118): Wikimedia\Rdbms\DBConnRef->insert(string, array, string)
#6 /srv/mediawiki/php-1.35.0-wmf.20/includes/resourceloader/ResourceLoader.php(590): Wikimedia\DependencyStore\SqlModuleDependencyStore->storeMulti(string, array, integer)
#7 /srv/mediawiki/php-1.35.0-wmf.20/includes/deferred/MWCallableUpdate.php(38): ResourceLoader->{closure}()
#8 /srv/mediawiki/php-1.35.0-wmf.20/includes/deferred/DeferredUpdates.php(417): MWCallableUpdate->doUpdate()
#9 /srv/mediawiki/php-1.35.0-wmf.20/includes/deferred/DeferredUpdates.php(296): DeferredUpdates::attemptUpdate(MWCallableUpdate, Wikimedia\Rdbms\LBFactoryMulti)
#10 /srv/mediawiki/php-1.35.0-wmf.20/includes/deferred/DeferredUpdates.php(233): DeferredUpdates::run(MWCallableUpdate, Wikimedia\Rdbms\LBFactoryMulti, Monolog\Logger, BufferingStatsdDataFactory, string)
#11 /srv/mediawiki/php-1.35.0-wmf.20/includes/deferred/DeferredUpdates.php(150): DeferredUpdates::handleUpdateQueue(array, string, integer)
#12 /srv/mediawiki/php-1.35.0-wmf.20/includes/MediaWiki.php(1057): DeferredUpdates::doUpdates(string)
#13 /srv/mediawiki/php-1.35.0-wmf.20/includes/MediaWiki.php(837): MediaWiki->restInPeace()
#14 /srv/mediawiki/php-1.35.0-wmf.20/includes/MediaWiki.php(846): MediaWiki->{closure}()
#15 /srv/mediawiki/php-1.35.0-wmf.20/load.php(51): MediaWiki->doPostOutputShutdown()
#16 /srv/mediawiki/w/load.php(3): require(string)
#17 {main}
```