Version 2.12.0-278.0.dev

Merge commit '388b6ff746ae7c0e32527fb81720dc6642a4be45' into 'dev'
diff --git a/tools/VERSION b/tools/VERSION
index 10b75b8..6eb7104 100644
--- a/tools/VERSION
+++ b/tools/VERSION
@@ -23,9 +23,9 @@
 #  * Making cherry-picks to stable channel
 #     - increase PATCH by 1
 #
-CHANNEL be
+CHANNEL dev
 MAJOR 2
 MINOR 12
 PATCH 0
-PRERELEASE 0
-PRERELEASE_PATCH 0
+PRERELEASE 278
+PRERELEASE_PATCH 0
\ No newline at end of file