Error when update ERPNEXT

I install my ERPNEXT by Bitnami Google Cloud Launcher.
But when i upgrade ERPNEXT by command
" bench migrate"
My ERPNEXT is down and show “Your system is being updated. Please refresh again after a few moments Status: 503”

I read very much article but not work for me.

Please help me because all my company is down.

Please try bench update. If you done some customization then check git status under erpnext and frappe app. If it is not important the then try git stash and update again

thank you your reply.

i fixed it by install new erpnext and restore by old sql file.
Data loss a little but i can control that.

Many thanks. Anyway ERPNEXT is the best. Love ERPNEXT.