diff --git a/Layout/default/Invoice/PDF_MAIN.php b/Layout/default/Invoice/PDF_MAIN.php
index 3d925dda9..6554b5834 100644
--- a/Layout/default/Invoice/PDF_MAIN.php
+++ b/Layout/default/Invoice/PDF_MAIN.php
@@ -90,10 +90,10 @@ $this->setReturnValue(['filename' => $invoice->invoice_number . ".pdf"]);
 
     <table style="border-collapse: collapse; width: 100%;" id="invoiceTable">
         <tr style="font-weight: bold; border-bottom: 1px solid black;" class="uneven">
-            <th style="text-align: center">Dienstleistung</th>
+            <th style="text-align: center">Leitung / Produkt</th>
             <th style="text-align: center">Zeitraum</th>
             <th style="text-align: right">Preis</th>
-            <th style="text-align: center;">Menge</th>
+            <th style="text-align: center">Menge</th>
             <th style="text-align: right">Netto €</th>
             <th style="text-align: right">Ust. %</th>
             <th style="text-align: right; padding-right: 4pt">Brutto €</th>
diff --git a/application/Billing/BillingController.php b/application/Billing/BillingController.php
index 45e9525c6..79dcde5e8 100644
--- a/application/Billing/BillingController.php
+++ b/application/Billing/BillingController.php
@@ -275,6 +275,11 @@ class BillingController extends mfBaseController {
                     continue;
                 }
 
+                if($contract->billing_period == 1 && $start_date->format("Y") < 2024 || ($start_date->format("Y") == 2024 && $start_date->format("m") < 7)) {
+                    // XXX only for 1st Billing after IVT Import
+                    $this->log->debug(__METHOD__.": Ignoring Contract ".$contract->id." with start_date ".$start_date->format("Y-m-d")." because is before this month");
+                }
+
                 // if contract has cancel date this month
                 // use cancel date as end_date
                 if ($cancel_date) {