diff --git a/src/pretix/control/views/organizer.py b/src/pretix/control/views/organizer.py
index 408805e7c7..0c26a0b2b5 100644
--- a/src/pretix/control/views/organizer.py
+++ b/src/pretix/control/views/organizer.py
@@ -3351,10 +3351,14 @@ class ReusableMediumCreateView(OrganizerDetailViewMixin, OrganizerPermissionRequ
     @transaction.atomic
     def form_valid(self, form):
         r = super().form_valid(form)
-        form.instance.log_action('pretix.reusable_medium.created', user=self.request.user, data={
+
+        data = {
             k: getattr(form.instance, k)
             for k in form.changed_data
-        })
+        }
+        if "linked_orderpositions" in data:
+            data["linked_orderpositions"] = data["linked_orderpositions"].values_list("pk", flat=True)
+        form.instance.log_action('pretix.reusable_medium.created', user=self.request.user, data=data)
         messages.success(self.request, _('Your changes have been saved.'))
         return r
 
@@ -3380,10 +3384,13 @@ class ReusableMediumUpdateView(OrganizerDetailViewMixin, OrganizerPermissionRequ
     @transaction.atomic
     def form_valid(self, form):
         if form.has_changed():
-            self.object.log_action('pretix.reusable_medium.changed', user=self.request.user, data={
+            data = {
                 k: getattr(self.object, k)
                 for k in form.changed_data
-            })
+            }
+            if "linked_orderpositions" in data:
+                data["linked_orderpositions"] = data["linked_orderpositions"].values_list("pk", flat=True)
+            self.object.log_action('pretix.reusable_medium.changed', user=self.request.user, data=data)
         messages.success(self.request, _('Your changes have been saved.'))
         return super().form_valid(form)