Hyundai MG7.9.8 – Transmission Fault After Wrong Flash – Need Help

Hi, I need some help with a Hyundai Avante 2007, Bosch MG7.9.8.

I accidentally flashed a different software version. The engine starts and runs normally, but now I have a transmission/gearbox fault that was not present before.

Original ECU:
HW 14901001 — SW GHD-7D6CQS7-A000 — Cal M98C340K

Current flash:
DGHD_7K6CFS1_5000

I don't have the original backup.

Is there any way to modify or repair the current flash so the transmission works correctly, without the original file?

Any technical advice or solution would be greatly appreciated.