diff --git a/participation/models.py b/participation/models.py
index a6b0094..1aab4ca 100644
--- a/participation/models.py
+++ b/participation/models.py
@@ -1254,6 +1254,10 @@ class Pool(models.Model):
         passage_width = 6 + (2 if has_observer else 0)
         passages = self.passages.all()
 
+        if not pool_size or not passages.count():
+            # Not initialized yet
+            return
+
         # Create tournament sheet if it does not exist
         self.tournament.create_spreadsheet()
 
@@ -1623,6 +1627,10 @@ class Pool(models.Model):
         worksheet.client.batch_update(spreadsheet.id, body)
 
     def update_juries_lines_spreadsheet(self):
+        if not self.participations.count() or not self.passages.count():
+            # Not initialized yet
+            return
+
         translation.activate(settings.PREFERRED_LANGUAGE_CODE)
 
         gc = gspread.service_account_from_dict(settings.GOOGLE_SERVICE_CLIENT)