change version to 2.0.0-alpha1
diff --git a/gensrc/script/gen_build_version.sh b/gensrc/script/gen_build_version.sh
index c2fc94f..bd9f7dd 100755
--- a/gensrc/script/gen_build_version.sh
+++ b/gensrc/script/gen_build_version.sh
@@ -28,10 +28,10 @@
set -eo pipefail
build_version_prefix="doris"
-build_version_major=0
+build_version_major=2
build_version_minor=0
build_version_patch=0
-build_version_rc_version="trunk"
+build_version_rc_version="alpha1"
build_version="${build_version_prefix}-${build_version_major}.${build_version_minor}.${build_version_patch}-${build_version_rc_version}"
