diff --git a/src/agenda_culturel/forms.py b/src/agenda_culturel/forms.py
index dd8ccc7..95a9329 100644
--- a/src/agenda_culturel/forms.py
+++ b/src/agenda_culturel/forms.py
@@ -441,6 +441,8 @@ class EventForm(GroupFormMixin, ModelForm):
 
         if self.is_moderation_expert and self.cleaned_data.get("new_tags") is not None:
             self.cleaned_data["tags"] += self.cleaned_data.get("new_tags")
+            # if a new tag is introduced, we clean the corresponding cache
+            Tag.clear_cache()
 
         # when cloning an existing event, we need to copy the local image
         if (
@@ -517,6 +519,8 @@ class EventModerateForm(ModelForm):
 
         if self.is_moderation_expert and self.cleaned_data.get("new_tags") is not None:
             self.cleaned_data["tags"] += self.cleaned_data.get("new_tags")
+            # if a new tag is introduced, we clean the corresponding cache
+            Tag.clear_cache()
 
         self.cleaned_data["tags"] = list(set(self.cleaned_data["tags"]))