diff --git a/src/pretix/control/views/event.py b/src/pretix/control/views/event.py
index f48221c7a1..cc14ab35aa 100644
--- a/src/pretix/control/views/event.py
+++ b/src/pretix/control/views/event.py
@@ -100,7 +100,7 @@ class MetaDataEditorMixin:
             if f.cleaned_data.get('value'):
                 f.save()
             elif f.instance and f.instance.pk:
-                f.delete()
+                f.instance.delete()
 
 
 class EventUpdate(EventSettingsViewMixin, EventPermissionRequiredMixin, MetaDataEditorMixin, UpdateView):