No more database access rights after BIOS UEFI upgrade....

I just made a BIOS upgrade today, and at first boot, OS started as usual 
(Fedora 43) but DK (appimage v8.9.0) advise me I've no more rights to 
access the DK database (SqLite).

I get easily a recovery by launching DK 8.8 from a windows partition 
(thanks to my dual boot, with shared NTFS data partition), which start 
properly (without any message...) at  first attemp, restoring thus 
access to the DK database back in Linux ....

NB : Unlike legacy BIOS, I'm not so familiar with UEFI BIOS upgrade/boot 
(it's my first UEFI config., but I suspect Secure Boot to be involved in 
this behaviour (CSM is deactivated)....

My question is : can somebody explain what happens, and how to solve it 
within a pure linux config. (I suppose that a dual boot is not mandatory 
to upgrade BIOS without preventing DK to start on a pure Linux config.! )?

Thank you very much.

BR
Olivier