D820n Flash fail

Starting flash process…
target rom version: 2.10.73.4
found large-zip header, file count: 8
processing file 1/8…
sending ‘zip’ (48841 KB)…
OKAY [ 3.110s]
writing ‘zip’…
(bootloader) rom parsing start …
(bootloader) rom parsing finish …
FAILED (remote: not allowed)
finished. total time: 3.219s
Flash process completed.
Flash not successfull, reboot will not be done

Reading information…
Using Fastboot mode…
Reading common information
(bootloader) version: 0.5
(bootloader) version-bootloader: 3.19.0.0000
(bootloader) version-baseband: 01.01.010_U10305041_08.01.50512
(bootloader) version-cpld: None
(bootloader) version-microp: None
(bootloader) version-main: 2.10.401.4
(bootloader) version-misc: PVT SHIP S-OFF
(bootloader) serialno: CC52AYC00282
(bootloader) imei: 357786060335897
(bootloader) imei2: Not Support
(bootloader) meid: 00000000000000
(bootloader) product: a51_ul
(bootloader) platform: hTCBmsm8939
(bootloader) modelid: 0PFJ40000
(bootloader) cidnum: RESPONSE
(bootloader) battery-status: good
(bootloader) battery-voltage: 0mV
(bootloader) partition-layout: Generic
(bootloader) security: off
(bootloader) build-mode: SHIP
(bootloader) boot-mode: FASTBOOT
(bootloader) commitno-bootloader: da038a09
(bootloader) hbootpreupdate: 11
(bootloader) gencheckpt: 0
(bootloader) mfg-name: 1001
all: Done!
Execution time is 22(ms)
Reading secure flag information
… (bootloader) secure_flag: 0
OKAY
Execution time is 15(ms)
Reading CID information
… (bootloader) cid: RESPONSE
OKAY
Execution time is 14(ms)
Reading MEID information
… (bootloader) meid: 00000000000000
OKAY
Execution time is 18(ms)
Read information completed.