diff --git a/kfet/templates/kfet/inventory_create.html b/kfet/templates/kfet/inventory_create.html
index 3ae3337e..293bcd6b 100644
--- a/kfet/templates/kfet/inventory_create.html
+++ b/kfet/templates/kfet/inventory_create.html
@@ -117,7 +117,7 @@ $(document).ready(function() {
         }
         
         var id = $line.find('input[type="hidden"]').val();
-        conflicts = conflicts.filter(item => item != id); 
+        conflicts = conflicts.delete(id); 
     }
 
     $('.finished input').change(function() {