hi
you must reset bootloder with this setup
WhosYourDaddy QC-DUBAI ARES BANGKOK LONDON ATOMU Y7 2019 - Y7PRIME 2019 - Y7 PRO 2019 - Enjoy 9 - Y9 2019QCOMM V9000051119
and flash xfile in fastboot mode after reset bootloder
just take backup qcn and rfnv data before operiton