Hello @Dilliraj Rai
Thanks for your post.
On this case, If you have any trusted device(Any device used before to log in... So, you can get prevent from being asked for the app code) or use your backup codes.
If any of those are an option, you can contact your administrator to get re-registered your MFA info account. The next doc below may be useful for your issue:
https://www.workday.com/en-us/workdayresourcecenterfaq.html
BR,