ASUS ROG DUAL 2070 SUPER cuda error and drivers

whats is wrong ?

root@DD:/# nvidia-driver-update

Loading drivers list - 44
Latest version - 460.39 (CUDA 11.2)
Installed version - 455.45.01 (CUDA 11.1)

Driver package already exists
Checking package integrity
check sums and md5 sums are ok

Stopping services
Unload modules failed (nvidia) ???

Starting services
Starting t-rex
Driver installation failed (1) ???