HTC DESIRE 826 Dual SIm NEED ADVICE

First i install latest twrp v3
and then root my phone using supersu {bootloader also unlocked}

then i cant OTA my phone

so i install stock recovery
1.17.707.8 (5.0.2)

then try to OTA

but then an error occurred
saying
THIS IS DEVICE A52DTUL
AND Package is A52DWGL

so cant proceed

in my device fastboot mode
show this info
A52_DWGL PVT SHIP S-ON
HBoot-3.19.0.0000
RADIO-1.25.C0413.3@50902


So
My question is
WHich stock ROM should i install in my device
DWGL or DTUL


also want to remove bootloader unlocked tag
and unroot my phone


So plz guide me what to do

reply fast