diff --git a/changelog/18651.txt b/changelog/18651.txt
new file mode 100644
index 000000000..9fc7ff8e4
--- /dev/null
+++ b/changelog/18651.txt
@@ -0,0 +1,3 @@
+```release-note:bug
+ui: cleanup unsaved auth method ember data record when navigating away from mount backend form
+```
\ No newline at end of file
diff --git a/ui/app/components/mount-backend-form.js b/ui/app/components/mount-backend-form.js
index fafd5a4a6..4cb9c33d5 100644
--- a/ui/app/components/mount-backend-form.js
+++ b/ui/app/components/mount-backend-form.js
@@ -33,7 +33,10 @@ export default class MountBackendForm extends Component {
   willDestroy() {
     // if unsaved, we want to unload so it doesn't show up in the auth mount list
     super.willDestroy(...arguments);
-    this.args.mountModel.rollbackAttributes();
+    if (this.args.mountModel) {
+      const method = this.args.mountModel.isNew ? 'unloadRecord' : 'rollbackAttributes';
+      this.args.mountModel[method]();
+    }
   }
 
   checkPathChange(type) {