Issue Centos/Almalinux conversion - preconversion check error

[Erwan]

Server operating system version

Centos 7.9

Plesk version and microupdate number

18.0.65

Hi,

I try to update ione server from Centos 7.9 to Almalinux 8.
I use: https://support.plesk.com/hc/en-us/...f-a-Plesk-server-from-CentOS-7-to-AlmaLinux-8

I have this error during the pre check:

Required pre-conversion condition 'checking if the Red Hat kernel is installed' not met:
No Red Hat signed kernel is installed.
To proceed with the conversion, install a kernel by running:
- 'yum install kernel kernel-tools kernel-tools-libs'
After installing the kernel fix the grub configuration by calling:
- `grub2-set-default 'CentOS Linux (newly_installed_kernel_version) 7 (Core)'`
- `grub2-mkconfig -o /boot/grub2/grub.cfg`
- `reboot`

Is it safe to do this?
The server is working fine. It won't have any impact to modify the grub? There is currently no boot problem.

Actually i have:
# uname -r
4.9.185-xxxx-std-ipv6-64

If I have to do the installation, what version should I put in:
`grub2-set-default 'CentOS Linux (newly_installed_kernel_version) 7 (Core)'`

=============================================================================================================================================================================================================================================
Package Architecture Version Dépôt Taille
=============================================================================================================================================================================================================================================
Installation :
kernel x86_64 3.10.0-1160.119.1.el7.tuxcare.els12 centos7els-rollout-2 52 M
kernel-tools x86_64 3.10.0-1160.119.1.el7.tuxcare.els12 centos7els-rollout-2 8.2 M
kernel-tools-libs x86_64 3.10.0-1160.119.1.el7.tuxcare.els12 centos7els-rollout-2 8.1 M
Installation pour dépendances :
grubby x86_64 8.28-26.el7 base 71 k

Thank you.
Erwan