Unable to install Nvidia driver on Debian 10

Hello
I have nvidia GeForce 920MX
debian 10 kde
CP intel i5 4288U
an error occurred during installation

nvidia-installer log file ‘/var/log/nvidia-installer.log’
creation time: date
installer version: 440.31

In File
PATH: /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin

nvidia-installer command line:
    ./nvidia-installer

Using: nvidia-installer ncurses v6 user interface
-> Detected 4 CPUs online; setting concurrency level to 4.
ERROR: An NVIDIA kernel module 'nvidia' appears to already be loaded in your kernel.  This may be because it is in use (for example, by an X server, a CUDA program, or the NVIDIA Persistence Daemon), but this may also happen if your kernel was configured without support for module unloading.  Please be sure to exit any programs that may be using the GPU(s) before attempting to upgrade your driver.  If no GPU-based programs are running, you know that your kernel supports module unloading, and you still receive this message, then an error may have occured that has corrupted an NVIDIA kernel module's usage count, for which the simplest remedy is to reboot your computer.
ERROR: Installation has failed.  Please see the file '/var/log/nvidia-installer.log' for details.  You may find suggestions on fixing installation problems in the README available on the Linux driver download page at www.nvidia.com.

ERROR: Installation has failed. Please see the file ‘/var/log/nvidia-installer.log’ for details. You may find suggestions on fixing installation
problems in the README available on the Linux driver download page at www.nvidia.com.
ERROR: Installation has failed. Please see the file ‘/var/log/nvidia-installer.log’ for details. You may find suggestions on fixing installation
problems in the README available on the Linux driver download page at www.nvidia.com.