Flr m email from ukvi

[bandesha10]

Hello
Advise needed from seniors
Applied flr m premium service on 17 august and they asked for further documents which posted in given time. Yesterday recieved an email from home office...

"This email is about the online Family Route visa application for XXXX.

This application is reaching the date of expiry. If you do not sign in again before Oct 2, 2017, the application will be deleted. This is done to protect your privacy.
Use this link to sign in to the application:"

Once sign in they say " the immigration rules for this type of visa have changed. If you started an appliation recently then click continue to application"
First time get such email. If anyone know what that email means?
Advance thanks