diff --git a/webapp/src/DataTransferObject/Shadowing/EventType.php b/webapp/src/DataTransferObject/Shadowing/EventType.php
index dfa66f332e..f486f054b5 100644
--- a/webapp/src/DataTransferObject/Shadowing/EventType.php
+++ b/webapp/src/DataTransferObject/Shadowing/EventType.php
@@ -18,6 +18,7 @@ enum EventType: string
     case PROBLEMS = 'problems';
     case RUNS = 'runs';
     case STATE = 'state';
+    case START_STATUS = 'start-status';
     case SUBMISSIONS = 'submissions';
     case TEAMS = 'teams';
     case TEAM_MEMBERS = 'team-members';
@@ -28,6 +29,11 @@ public static function fromString(string $value): EventType
             return EventType::CONTESTS;
         }
 
+        // When encountering an error for an unknown event
+        // consider if we need to verify this as shadow or
+        // ignore it by adding the case in:
+        // webapp/src/DataTransferObject/Shadowing/EventType.php
+        // webapp/src/Service/ExternalContestSourceService.php
         return EventType::from($value);
     }
 
diff --git a/webapp/src/Service/ExternalContestSourceService.php b/webapp/src/Service/ExternalContestSourceService.php
index 54e2d96d7c..f50ccee457 100644
--- a/webapp/src/Service/ExternalContestSourceService.php
+++ b/webapp/src/Service/ExternalContestSourceService.php
@@ -623,7 +623,7 @@ public function importEvent(Event $event, array $eventsToSkip): void
 
         // Note the @vars here are to make PHPStan understand the correct types.
         $method = match ($event->type) {
-            EventType::ACCOUNTS, EventType::AWARDS, EventType::MAP_INFO, EventType::PERSONS, EventType::TEAM_MEMBERS => $this->ignoreEvent(...),
+            EventType::ACCOUNTS, EventType::AWARDS, EventType::MAP_INFO, EventType::PERSONS, EventType::START_STATUS, EventType::TEAM_MEMBERS => $this->ignoreEvent(...),
             EventType::STATE => $this->validateState(...),
             EventType::CONTESTS => $this->validateAndUpdateContest(...),
             EventType::JUDGEMENT_TYPES => $this->importJudgementType(...),