P9 can't flash partition

p9 l31 get error when flash board file .
first i flash phone with board file phone work fine after flashing with normal firmware firmware phone lcd display was blank i try to flash board file again now get this error any help team ..


--------- 2018-07-05 17:53:01 ---------
SigmaKey 2.28.03 HiSi: Write firmware
(ADB) Repairing...HL2VENUSMAA001052.skf
Continue Repair procedure according to the manual.
Phone model: HUAWEI
Version: :HL2VENUSMAA001052
Writing flash...ptable..Command not allowed