Regenerate OrderPosition.web_secret when chaning other secrets

src/pretix/control/forms/orders.py

@@ -490,7 +490,9 @@ class OrderPositionChangeForm(forms.Form):
     )
     operation_secret = forms.BooleanField(
         required=False,
-        label=_('Generate a new secret')
+        label=_('Generate a new secret'),
+        help_text=_('This affects both the ticket secret (often used as a QR code) as well as the link used to '
+                    'individually access the ticket.')
     )
     operation_cancel = forms.BooleanField(
         required=False,

src/pretix/control/views/orders.py

@@ -2241,6 +2241,8 @@ class OrderContactChange(OrderView):
                 changed = True
                 self.order.secret = generate_secret()
                 for op in self.order.all_positions.all():
+                    op.web_secret = generate_secret()
+                    op.save(update_fields=["web_secret"])
                     assign_ticket_secret(
                         self.request.event, position=op, force_invalidate=True, save=True
                     )