Fix make:collection flow

Author: robdekort

src/Models/Collection.php

@@ -136,6 +136,10 @@ protected function promptForAddPage(): bool
 
     protected function promptForPage(): string
     {
+        if (! $this->shouldMount) {
+            return '';
+        }
+
         if ($this->addPage) {
             return text(
                 label: 'What should be the page title for this mount?',