LG M200n FRP Error!

Hello!
I have LG M200N with FRP. i try nto reset with Z3X but i recive error. i read many post and i understand its posible with downgrade.
I flash allredy M200n10c_00_WIN_IT_OP_1206.kdz from support but not work.
What firmware i nned to flash for reset FRP?
Ty! BR!