refactor: update fatal message.

Author: liqiang-fit2cloud

installer/start-all.sh

@@ -4,8 +4,8 @@ set -e
 
 if [ -f "/opt/maxkb/PG_VERSION" ]; then
   # 如果是v1版本一键安装的的目录则退出
-  echo "The existing data is from v1 and is not compatible with v2, installing v2 over v1 is not supported."
-  echo "The process will now exit."
+  echo "FATAL ERROR: Upgrade from v1 to v2 is not supported."
+  echo "The process will exit."
   exit 1
 fi