diff --git a/src/iso-conf/meta-data/README.md b/src/iso-conf/meta-data/README.md
index 0c7df2c..f98a88f 100644
--- a/src/iso-conf/meta-data/README.md
+++ b/src/iso-conf/meta-data/README.md
@@ -20,7 +20,7 @@
 | 018 |  ???   | -           |
 | 019 |  ???   | -           |
 | 020 |  ???   | -           |
-| 021 |  ???   | -           |
+| 021 |  ❌  | -           |
 | 022 |  ❌    | -           |
 | 023 |   ❌   | From v22.          |
 | 024 |   ❌   | From v22.           |