diff --git a/configs/board-bigtreetech_cb1_bookworm.conf b/configs/board-bigtreetech_cb1_bookworm.conf
index b99e162..b77e31c 100644
--- a/configs/board-bigtreetech_cb1_bookworm.conf
+++ b/configs/board-bigtreetech_cb1_bookworm.conf
@@ -1,3 +1,2 @@
 BOARD=bigtreetech-cb1
 RELEASE=bookworm
-BRANCH=legacy
diff --git a/configs/board-bigtreetech_cb1_bullseye.conf b/configs/board-bigtreetech_cb1_bullseye.conf
index f71bd13..8957380 100644
--- a/configs/board-bigtreetech_cb1_bullseye.conf
+++ b/configs/board-bigtreetech_cb1_bullseye.conf
@@ -1,2 +1 @@
 BOARD=bigtreetech-cb1
-BRANCH=legacy