diff --git a/addons/project/static/src/views/project_task_kanban/project_task_kanban_model.js b/addons/project/static/src/views/project_task_kanban/project_task_kanban_model.js
index 5c224555389..e2302b885bd 100644
--- a/addons/project/static/src/views/project_task_kanban/project_task_kanban_model.js
+++ b/addons/project/static/src/views/project_task_kanban/project_task_kanban_model.js
@@ -12,9 +12,10 @@ export class ProjectTaskKanbanGroup extends KanbanModel.Group {
 
     async delete() {
         if (this.isPersonalStageGroup) {
+            this.deleted = true;
             return await this.model.orm.call(this.resModel, 'remove_personal_stage', [this.resId]);
         } else {
-            return super.delete();
+            return await super.delete();
         }
     }
 }