Vyos 1.1.8 vrrp run-transition-scripts with root,how to use another user or group?

vrrp

#1

I want run script when vrrp status change.
But i found i cant config with cli after script on.
the terminal display:
Active configuration has been changed by user ‘root’ on ‘?’.
Please make sure you do not have conflicting changes. You can also discard
the current changes by issuing ‘exit discard’.
EOF

I think script run as user root.
I try use head
#!/bin/vbash
source /opt/vyatta/etc/functions/script-template
and add
if [ “(id -g -n)" != 'vyattacfg' ] ; then exec sg vyattacfg -c "/bin/vbash (readlink -f 0) @”
fi
at the top, but no usefully.
run-transition-scripts can not use sg vyattycfg /path.
how to fix this ? please help . thanks a lot.