diff --git a/addons/project/static/src/views/project_task_kanban/project_task_kanban_record.js b/addons/project/static/src/views/project_task_kanban/project_task_kanban_record.js
index cedcaaba6bd..71c88065603 100644
--- a/addons/project/static/src/views/project_task_kanban/project_task_kanban_record.js
+++ b/addons/project/static/src/views/project_task_kanban/project_task_kanban_record.js
@@ -5,7 +5,7 @@ import { Record } from '@web/views/relational_model';
 export class ProjectTaskRecord extends Record {
     async _applyChanges(changes) {
         const value = changes.personal_stage_type_ids;
-        if (value && Array.isArray(value) && value.length === 1) {
+        if (value && Array.isArray(value)) {
             delete changes.personal_stage_type_ids;
             changes.personal_stage_type_id = value;
         }