diff --git a/core/modules/editor/js/editor.js b/core/modules/editor/js/editor.js
index 5893e116075d23cf273c64396954c52285d4ea09..18493d6f8bd7ad962db28ab10257eb75ac8d8602 100644
--- a/core/modules/editor/js/editor.js
+++ b/core/modules/editor/js/editor.js
@@ -60,7 +60,10 @@ Drupal.behaviors.editor = {
         if (event.isDefaultPrevented()) {
           return;
         }
-        Drupal.editorDetach(field, settings.editor.formats[activeFormatID], 'serialize');
+        // Detach the current editor (if any).
+        if (settings.editor.formats[activeFormatID]) {
+          Drupal.editorDetach(field, settings.editor.formats[activeFormatID], 'serialize');
+        }
       });
     });
   },