diff --git a/metadata/gorefs/goref-0000028.md b/metadata/gorefs/goref-0000028.md
index bf4213bc..5e197eca 100644
--- a/metadata/gorefs/goref-0000028.md
+++ b/metadata/gorefs/goref-0000028.md
@@ -1,6 +1,7 @@
 ---
 authors: PAMGO_MGG curators
 id: "GO_REF:0000028"
+is_obsolete: false
 year: 2008
 layout: goref
 ---