oppo f5 unable to format with cm2 plz help

Card found : 0CF1AA70 , v0137
Infinity-Box Chinese Miracle MediaTek Service Module [ MTK ] v2.02

Load IDBase v11861 Ok!


Operation : Reset Settings/Format FS [ v2.02 ]

1. Make sure device is powered off. Power off, if need. Wait 20 seconds after
2. Insert USB cable in phone
Waiting for device connection ...

PTFN : OPPO PreLoader USB VCOM (Android) (COM22)
MODE : PRELOADER PORT
PORT : 22
Waiting BOOT ack ...
PRELOADER : ACK confirmed!
BROM : Init BROM
BROM init passed!
CHIP : MT6763 , SBID : 0x8A00 , HWVR : 0xCA01 , SWVR : 0x0001
TYPE : MODERN RAPHAEL
BROM : SecLevel : 0x00000005
BROM : SecMode : SBC+SDA
BROM : PRELOADER PORT
MODE : Oppo : F5 | Manual : Disabled
AGENT : Look for suitable BootChain in DA ...
AGENT : DA_PL_CRYPTO.bin
AGENT : Found MT6763
AGENT : MTK_DOWNLOAD_AGENT
BROM : Sending 1st DA ...

BROM : 0x00002001 : DA SEND ERROR!
ERROR : SECURE BOOT : MISMATCH BOOT SIGNATURE!
INFO : PRELOADER Level : CORRECT DA required : PL/PL_CRYPTO

Error : Fail to init protocol!
Remove battery, cable. Check cable/connection/driver! Check SW hint! Repeat operation!

Reconnect Power/Cable!


oppo f5 how to format always failed