diff --git a/src/EventSubscriber/ConversionProcessing/StartProcessingSubscriber.php b/src/EventSubscriber/ConversionProcessing/StartProcessingSubscriber.php
index cfb6a89..798d79f 100644
--- a/src/EventSubscriber/ConversionProcessing/StartProcessingSubscriber.php
+++ b/src/EventSubscriber/ConversionProcessing/StartProcessingSubscriber.php
@@ -20,6 +20,6 @@ public function start(ConversionProcessingStartedEvent $event): void
     {
         $event->conversion->setLastProcessingStartedAt(new \DateTimeImmutable());
         $event->conversion->setProcessing(true);
-        $event->conversion->setLogMessages(['Processing started']);
+        $event->conversion->addLogMessage('Processing started');
     }
 }