diff --git a/apps/participation/models.py b/apps/participation/models.py
index 3c64a7e..c19f9f8 100644
--- a/apps/participation/models.py
+++ b/apps/participation/models.py
@@ -65,7 +65,7 @@ class Team(models.Model):
             "education",
             raise_error=False,
         )
-        if self.participation.valid:
+        if self.pk and self.participation.valid:
             get_sympa_client().subscribe(self.email, "equipes", False, f"Equipe {self.name}")
             get_sympa_client().subscribe(self.email, f"probleme-{self.participation.problem}", False,
                                          f"Equipe {self.name}")
diff --git a/apps/participation/signals.py b/apps/participation/signals.py
index a7ee7d4..67998d9 100644
--- a/apps/participation/signals.py
+++ b/apps/participation/signals.py
@@ -2,7 +2,7 @@ from corres2math.lists import get_sympa_client
 from participation.models import Participation, Team, Video
 
 
-def create_team_participation(instance, **_):
+def create_team_participation(instance, created, **_):
     """
     When a team got created, create an associated team and create Video objects.
     """
@@ -12,6 +12,8 @@ def create_team_participation(instance, **_):
     if not participation.synthesis:
         participation.synthesis = Video.objects.create()
     participation.save()
+    if not created:
+        participation.team.create_mailing_list()
 
 
 def update_mailing_list(instance: Team, **_):