fix(EmailGroupFactory): skip post-generation save to prevent duplicat…

…e key errors

lemarche/conversations/factories.py

@@ -20,6 +20,7 @@ class Meta:
 class EmailGroupFactory(DjangoModelFactory):
     class Meta:
         model = EmailGroup
+        skip_postgeneration_save = True  # To avoid error "duplicate key" when saving TemplateTransactional factory
 
     display_name = factory.Faker("name", locale="fr_FR")
     description = factory.Faker("name", locale="fr_FR")