Clean up invoice activity records

app/Listeners/ActivityListener.php

@@ -127,6 +127,10 @@ class ActivityListener
      */
     public function updatedInvoice(InvoiceWasUpdated $event)
     {
+        if (! $event->invoice->isChanged()) {
+            return;
+        }
+
         $backupInvoice = Invoice::with('invoice_items', 'client.account', 'client.contacts')
                             ->withTrashed()
                             ->find($event->invoice->id);

app/Models/Invoice.php

@@ -190,6 +190,15 @@ class Invoice extends EntityModel implements BalanceAffecting
         return floatval($this->amount) - floatval($this->getOriginal('amount'));
     }
 
+    public function isChanged()
+    {
+        $dirty = $this->getDirty();
+
+        unset($dirty['invoice_status_id']);
+
+        return count($dirty) > 0;
+    }
+
     /**
      * @param bool $calculate
      * @return int|mixed