diff --git a/mycaldav/models.py b/mycaldav/models.py
index 13a9870..cae29e6 100644
--- a/mycaldav/models.py
+++ b/mycaldav/models.py
@@ -198,7 +198,11 @@ class cls_caldav_client():
 
     def format_data_event(self,event):
         summary = event.vobject_instance.vevent.summary.value
+        if "-" not in summary:
+            return False
         key = summary.split("-")
+        if "&" not in key[1]:
+            return False
         equipage = key[1].split("&")
         team_1 = ""
         team_2 = ""