diff --git a/kfet/static/kfet/js/history.js b/kfet/static/kfet/js/history.js
index 5608c02f..98bc7a2a 100644
--- a/kfet/static/kfet/js/history.js
+++ b/kfet/static/kfet/js/history.js
@@ -14,7 +14,7 @@ function KHistory(options = {}) {
                 if ($(this).hasClass('opegroup')) {
                     var opegroup = $(this).data('id');
                     $(this).siblings('.ope').filter(function () {
-                        return $(this).data('opegroup') == opegroup
+                        return $(this).data('group') == opegroup
                     }).addClass('ui-selected');
                 }
             });
@@ -38,14 +38,16 @@ function KHistory(options = {}) {
             case 'operation':
                 for (let ope of opegroup['opes']) {
                     var $ope = this._opeHtml(ope, is_cof, trigramme);
-                    $ope.data('opegroup', opegroup['id']);
+                    $ope.data('group', opegroup['id']);
+                    $ope.data('group_type', type);
                     $opegroup.after($ope);
                 }
                 break;
             case 'transfer':
                 for (let transfer of opegroup['opes']) {
                     var $transfer = this._transferHtml(transfer);
-                    $transfer.data('transfergroup', opegroup['id']);
+                    $transfer.data('group', opegroup['id']);
+                    $transfer.data('group_type', type);
                     $opegroup.after($transfer);
                 }
                 break;
@@ -268,10 +270,8 @@ function KHistory(options = {}) {
             "operations": [],
         }
         this.$container.find('.ope.ui-selected').each(function () {
-            if ($(this).data("transfergroup"))
-                opes_to_cancel["transfers"].push($(this).data("id"));
-            else
-                opes_to_cancel["operations"].push($(this).data("id"));
+            type = $(this).data("group_type");
+            opes_to_cancel[`${type}s`].push($(this).data("id"));
         });
         if (opes_to_cancel["transfers"].length > 0 && opes_to_cancel["operations"].length > 0) {
             // Lancer 2 requêtes AJAX et gérer tous les cas d'erreurs possibles est trop complexe
diff --git a/kfet/views.py b/kfet/views.py
index 4944546e..e4fd2564 100644
--- a/kfet/views.py
+++ b/kfet/views.py
@@ -1799,7 +1799,7 @@ def cancel_transfers(request):
         .filter(pk__in=transfers)
         .order_by("pk")
     )
-    data["canceled"] = transfers
+    data["canceled"] = list(transfers)
     if transfers_already_canceled:
         data["warnings"]["already_canceled"] = transfers_already_canceled
     return JsonResponse(data)