diff --git a/src/pretix/control/views/event.py b/src/pretix/control/views/event.py
index 12e71af84..9f9badb7e 100644
--- a/src/pretix/control/views/event.py
+++ b/src/pretix/control/views/event.py
@@ -243,12 +243,8 @@ class EventUpdate(DecoupleMixin, EventSettingsViewMixin, EventPermissionRequired
         }
         meta_changed = {}
         for f in self.meta_forms:
-            meta_changed.update({
-                k: (f.cleaned_data.get(k).name
-                    if isinstance(f.cleaned_data.get(k), File)
-                    else f.cleaned_data.get(k))
-                for k in f.changed_data
-            })
+            if f.has_changed():
+                meta_changed[f.property.name] = f.cleaned_data["value"]
         if meta_changed:
             change_data['meta_data'] = meta_changed
         if change_data:
diff --git a/src/pretix/control/views/item.py b/src/pretix/control/views/item.py
index 179b8cd09..f55f678c0 100644
--- a/src/pretix/control/views/item.py
+++ b/src/pretix/control/views/item.py
@@ -1447,12 +1447,8 @@ class ItemUpdateGeneral(ItemDetailMixin, EventPermissionRequiredMixin, MetaDataE
 
         meta_changed = {}
         for f in self.meta_forms:
-            meta_changed.update({
-                k: (f.cleaned_data.get(k).name
-                    if isinstance(f.cleaned_data.get(k), File)
-                    else f.cleaned_data.get(k))
-                for k in f.changed_data
-            })
+            if f.has_changed():
+                meta_changed[f.property.name] = f.cleaned_data["value"]
         if meta_changed:
             change_data['meta_data'] = meta_changed
 
diff --git a/src/pretix/control/views/subevents.py b/src/pretix/control/views/subevents.py
index 7f4cce9d6..a25ec4f57 100644
--- a/src/pretix/control/views/subevents.py
+++ b/src/pretix/control/views/subevents.py
@@ -549,12 +549,8 @@ class SubEventUpdate(EventPermissionRequiredMixin, SubEventEditorMixin, UpdateVi
         }
         meta_changed = {}
         for f in self.meta_forms:
-            meta_changed.update({
-                k: (f.cleaned_data.get(k).name
-                    if isinstance(f.cleaned_data.get(k), File)
-                    else f.cleaned_data.get(k))
-                for k in f.changed_data
-            })
+            if f.has_changed():
+                meta_changed[f.property.name] = f.cleaned_data["value"]
         if meta_changed:
             change_data['meta_data'] = meta_changed
         for f in self.plugin_forms:
@@ -646,12 +642,8 @@ class SubEventCreate(SubEventEditorMixin, EventPermissionRequiredMixin, CreateVi
 
         meta_changed = {}
         for f in self.meta_forms:
-            meta_changed.update({
-                k: (f.cleaned_data.get(k).name
-                    if isinstance(f.cleaned_data.get(k), File)
-                    else f.cleaned_data.get(k))
-                for k in f.cleaned_data
-            })
+            if f.has_changed():
+                meta_changed[f.property.name] = f.cleaned_data["value"]
         if meta_changed:
             data['meta_data'] = meta_changed