huawei cun-u29 da plz

Wait for phone...
Phone found! [ 4 ]
Sync...
Inital Boot Ok!
BB_CPU_PID : 6582
BB_CPU_NME : [MediaTek] MT6582_S00
BB_CPU_EXT : 0xCA01 , 0x8A00 , 0x0000
Processing BROM stage
Settings for BROM configured!
SecCfgVal : 0x00000000
BromVer : 0x00FF
BLVersion : 0x0001
PreLoader : Active [ Boot with PL ]
BootLdrSS : NORMAL with PRELOADER
Processing DA stage
DA Select done, will use MTK_AllInOne_DA_v5.1624.16.07
Sending and initialize DA ...

[DA_ERROR] : SECURITYBOOT_BOOT_NOT_ACCEPTED
Boot Error!

Operation Failed
Elapsed: 00:00:03
Reconnect Power/Cable!