Now always new update come from Lenovo but if you Root your Lenovo Mobile than rooting lonovo can be done only after changing the Lenovo recovery mod with custom recovery mod.
If you change you Lenovo recovery mod with custom recovery mod and you get android version update , that update required your lenovo recovery mod because that recovery mod only can install the Android update
Custom recoverymod does not have feature of updating latest android version not only in Lenovo but also in other company of Mobile.
In this process i will show how can you again replace your custom recovery mod with the lenovo recovery mod.
h For the process you have to download the below file
Lenovo recovery Mod
Lenovo recovery Mod Process