Side effect of request #27560.
Trace:
PHP message: PHP Fatal error: Uncaught TypeError: Tuleap\Tracker\Reference\CrossReferenceValidator::removeReferenceIfNeeded(): Argument #1 ($artifact_id) must be of type int, string given, called in /usr/share/tuleap/plugins/tracker/include/Tracker/Reference/CrossReferenceValidator.php on line 45 and defined in /usr/share/tuleap/plugins/tracker/include/Tracker/Reference/CrossReferenceValidator.php:50#012Stack trace:#012#0 /usr/share/tuleap/plugins/tracker/include/Tracker/Reference/CrossReferenceValidator.php(45): Tuleap\Tracker\Reference\CrossReferenceValidator->removeReferenceIfNeeded()#012#1 /usr/share/tuleap/plugins/tracker/include/trackerPlugin.php(2056): Tuleap\Tracker\Reference\CrossReferenceValidator->removeInvalidCrossReferences()#012#2 /usr/share/tuleap/src/common/Event/EventManager.class.php(127): trackerPlugin->checkCrossReferenceValidityEvent()#012#3 /usr/share/tuleap/src/common/Plugin/PluginLoader.php(73): EventManager->eventManagerDispatch()#012#4 /usr/share/tuleap/src/common/Event/EventManager.class" while reading response header from upstream, client: X.X.X.X, server: tuleap.net, request: "GET /api/artifacts/2047/linked_artifacts?direction=forward&nature=_is_child&offset=50&limit=50 HTTP/1.1"