iPad pro 12.9 2gen Boot diag problem.. need help..

[parengBok]

gudday mates,

i have here iPad pro 12.9 2gen hello status.

need to change sn.. but having this problem on unlocktool.

need guide. thanks


logs:

BOOT DIAG Checking for device... OK
Info : iPad Pro 12.9-inch (2nd gen, WiFi) [iPad7,1-j120ap]
Boot : [IBOOT-3135.0.0.2.3] [DFU]
Pwnder : ULTOOL
Initializing... OK
Sending ibss.img4... OK
Sending ibec.img4... OK
Executing loader... FAIL
Device is in RECOVERY!
UNLOCKTOOL 2023.06.09.0
Elapsed time : 17 seconds


how to solve?