diff --git a/src/agenda_culturel/models.py b/src/agenda_culturel/models.py
index bef644e..9520dee 100644
--- a/src/agenda_culturel/models.py
+++ b/src/agenda_culturel/models.py
@@ -1465,9 +1465,11 @@ class Event(models.Model):
         ):
             self.download_image()
 
-        # remove "/" from tags
         if self.tags:
+            # remove "/" from tags
             self.tags = [t.replace("/", "-") for t in self.tags]
+            # remove duplicate tags
+            self.tags = list(set(self.tags))
 
         # in case of importation process
         if self.is_in_importation_process():