diff --git a/server/planning/events/events.py b/server/planning/events/events.py
index 5364251cb..b6f41bbc3 100644
--- a/server/planning/events/events.py
+++ b/server/planning/events/events.py
@@ -109,7 +109,7 @@ def get_subject_str(subject: Dict[str, str]) -> str:
             subject.get("name", ""),
             subject.get("qcode", ""),
             subject.get("scheme", ""),
-            subject.get("translations", ""),
+            str(subject.get("translations", "")),
         ]
     )
 
diff --git a/server/planning/tests/events_service_test.py b/server/planning/tests/events_service_test.py
index 9dce29300..77cc09a1a 100644
--- a/server/planning/tests/events_service_test.py
+++ b/server/planning/tests/events_service_test.py
@@ -37,6 +37,16 @@ def test_is_new_version():
 
     assert service.is_new_version(new_event, old_event)
 
+    new_event["subject"] = [{"qcode": "foo", "name": "foo", "translations": {"fr-CA": "Foo"}}]
+    old_event["subject"] = [{"qcode": "foo", "name": "foo", "translations": None}]
+
+    assert service.is_new_version(new_event, old_event)
+
+    new_event["subject"] = [{"qcode": "foo", "name": "foo", "translations": {"fr-CA": "Bar"}}]
+    old_event["subject"] = [{"qcode": "foo", "name": "foo", "translations": {"fr-CA": "Foo"}}]
+
+    assert service.is_new_version(new_event, old_event)
+
 
 def test_should_update():
     service = EventsService()