DRK fix 100%

In androids DRK is most important for legal using 

But in case of Custom binary we lost our DRK = Device Root Key 

Let's fix it

1. You need to flash twrp 

2. Then install custom ROM deodex

This error is fix 100% by this method 

I personally use this 

I tried more method but not work 

If they fix this then in my Recovery DM -Verity failed display 

And i am unable to update my phone