add overdue

app/Console/Commands/CheckInvoiceStatus.php

@@ -41,11 +41,12 @@ class CheckInvoiceStatus extends Command
     {
         $date = Carbon::now();
         $invoices = Invoice::whereNotIn('status', [Invoice::STATUS_COMPLETED, Invoice::STATUS_DRAFT])
+            ->where('overdue', false)
             ->whereDate('due_date', '<', $date)
             ->get();
 
         foreach ($invoices as $invoice) {
-            $invoice->status = Invoice::STATUS_OVERDUE;
+            $invoice->overdue = true;
             printf("Invoice %s is OVERDUE \n", $invoice->invoice_number);
             $invoice->save();
         }