Upgrade from SLES15SP4 to SP5 in silent mode ? and without integrity check on custom packages?


I’m trying to make an upgrade from SLES15 SP4 to SLES15 SP5: for the moment, I succeeded but it’s not silent (I need to confirm the upgrade and the reboot when it’s done) and, as I have some custom packages installed, there is a warning because these packages are not signed.
How can I avoid that ?

I tried to add the option fsck.mode=skip in grub menu but it did not work for the integrity check.
Any help will be appreciate