bugfix: duplicate with new form structure

utils/functions.js

@@ -64,12 +64,16 @@ export function cleanInvoiceBeforeDuplicate(invoice) {
   invoice.invoicingDate = formatDateForPost(new Date());
   delete invoice["@id"];
   delete invoice.batches["@id"];
-  invoice.batches.forEach((batch, indexb) => {
-    delete invoice.batches[indexb]["@id"];
-    batch.tasks.forEach((task, indext) => {
-      delete invoice.batches[indexb].tasks[indext]["@id"];
+  if (invoice.batches['ldp:contains']) {
+    invoice.batches['ldp:contains'].forEach((batch, indexb) => {
+      delete invoice.batches['ldp:contains'][indexb]["@id"];
+      if (batch.tasks['ldp:contains']) {
+        batch.tasks['ldp:contains'].forEach((task, indext) => {
+          delete invoice.batches['ldp:contains'][indexb].tasks['ldp:contains'][indext]["@id"];
+        });
+      }
     });
-  });
+  }
   return invoice;
 }