As Bootloader IROM starting address 0x78000 and size 0x6000 is same in SDK 13.0 and 12.2.0 expecting to update Device firmware (BL+SD+APP) from 12.2.0 to 13.0.0 SDK.But in my case DFU update (secure BL+SD+APP) or DFU Update (secure BL+SD) from 12.02 to 13.0 is failing even though private keys are same.`
Also tested DFU updates are working for without issues from 12.0.2 to 12.0.2 and 13.0 to 13.0 without any issues.