diff --git a/kernel/model/attribute_view.go b/kernel/model/attribute_view.go
index b8bc752c5..a59cfa951 100644
--- a/kernel/model/attribute_view.go
+++ b/kernel/model/attribute_view.go
@@ -1488,6 +1488,9 @@ func genGroup(view *av.View, attrView *av.AttributeView) {
 		case av.LayoutTypeGallery:
 			v = av.NewGalleryView()
 			v.Gallery = av.NewLayoutGallery()
+		default:
+			logging.LogWarnf("unknown layout type [%s] for group view", view.LayoutType)
+			return
 		}
 		for _, item := range groupItems {
 			v.GroupItemIDs = append(v.GroupItemIDs, item.GetID())