diff --git a/src/agenda_culturel/import_tasks/custom_extractors/fbevents.py b/src/agenda_culturel/import_tasks/custom_extractors/fbevents.py
index 18a558d..d20677a 100644
--- a/src/agenda_culturel/import_tasks/custom_extractors/fbevents.py
+++ b/src/agenda_culturel/import_tasks/custom_extractors/fbevents.py
@@ -111,7 +111,9 @@ class CExtractor(TwoStepsExtractor):
             for event in fevent.build_events(event_url):
                 event["published"] = published
 
-                self.add_event(default_values, **event)
+                # only add the event if its unknown
+                if len([e for e in self.events if event["uuids"][0] in e["uuids"]]) == 0:
+                    self.add_event(default_values, **event)
         else:
             if debug:
                 CExtractor.dump_content_for_debug(event_content, event_url)