diff --git a/src/Model/TranslatableTrait.php b/src/Model/TranslatableTrait.php
index f30542e..08c49bd 100644
--- a/src/Model/TranslatableTrait.php
+++ b/src/Model/TranslatableTrait.php
@@ -145,7 +145,7 @@ public function getTranslations(): Collection
     public function hasTranslation(TranslationInterface $translation): bool
     {
         return isset($this->translationsCache[$translation->getLocale()])
-               || $this->translations->containsKey($translation->getLocale());
+               || (null !== $translation->getLocale() && $this->translations->containsKey($translation->getLocale()));
     }
 
     /**