diff --git a/addons/web_planner/static/src/js/web_planner_common.js b/addons/web_planner/static/src/js/web_planner_common.js
index 5994f07262d..ebdef0fc56f 100644
--- a/addons/web_planner/static/src/js/web_planner_common.js
+++ b/addons/web_planner/static/src/js/web_planner_common.js
@@ -148,7 +148,7 @@ var PlannerDialog = Widget.extend({
             last_open_page = this.planner.data.last_open_page || false;
         }
 
-        if (last_open_page) {
+        if (last_open_page && this._find_page_by_id(last_open_page)) {
             this._display_page(last_open_page);
         } else {
             this._display_page(this.pages[0].id);