diff --git a/office-alexander-logistics-app/src/main/webapp/js/imixs-office.workitem.custom.js b/office-alexander-logistics-app/src/main/webapp/js/imixs-office.workitem.custom.js
index 5607f87..6003079 100644
--- a/office-alexander-logistics-app/src/main/webapp/js/imixs-office.workitem.custom.js
+++ b/office-alexander-logistics-app/src/main/webapp/js/imixs-office.workitem.custom.js
@@ -3,10 +3,12 @@
 
 /**
  * Hier fuellen wir die Buchungsperiode falls nichts eingetragen
+ * - Change 9.2.2021 - keine Vorbefuellung mehr!
  * 
  */
 $(document).ready(function() {
 	// check data-item invoice-date and invoice-period....
+	/* - disabled 9.2.2021
 	date = $("input[data-item='invoice.date']");
 	period=$("input[data-item='invoice.period']");
 	if (period && date) {
@@ -18,4 +20,6 @@ $(document).ready(function() {
 			$("input[data-item='invoice.period']").val(newval);
 		}
 	}
+	*/
+	
 });
\ No newline at end of file
diff --git a/workflow/rechnungseingang-de-1.0.4.bpmn b/workflow/rechnungseingang-de-1.0.4.bpmn
index ad0ea5b..bbf9b3b 100644
--- a/workflow/rechnungseingang-de-1.0.4.bpmn
+++ b/workflow/rechnungseingang-de-1.0.4.bpmn
@@ -2090,7 +2090,7 @@ result.isValid=true;
  
   <imixs-form-section columns="2">
     <item name="cdtr.number" type="text"  required="true"   label="Kreditorennummer:" />
-    <item name="invoice.period" type="text"  required="false"   label="Buchungsperiode (yyyymm):" />
+    <item name="invoice.period" type="text"  required="true"   label="Buchungsperiode (yyyymm):" />
    </imixs-form-section>
 </imixs-form>]]></bpmn2:documentation>
       <bpmn2:dataState id="DataState_2"/>