diff --git a/js/mzta-prompts.js b/js/mzta-prompts.js
index 4b2982aa..972c3b17 100644
--- a/js/mzta-prompts.js
+++ b/js/mzta-prompts.js
@@ -162,6 +162,8 @@ export function preparePromptsForExport(prompts){
                     delete prompt[key];
                 }
             })
+        }else{
+            delete prompt['idnum'];
         }
     });
     return output;