Update not possible under SOLUS OS 4.7

[Brice-Angel]

Following the discontinuation of SNAP repositories, I installed the new version of FERDIUM via FLATHUB in February 2025.
For several weeks, FERDIUM has been requesting the update, but each restart does not allow it to be installed.
Despite my extensive research, I have not been able to find a solution.
Would you kindly advise me on the process to follow?

Here are the specifications for my system :

Operating System: Solus 4.7
KDE Plasma Version: 6.4.3
KDE Frameworks Version: 6.16.0
Qt Version: 6.9.1
Kernel Version: 6.15.6-321.current (64-bit)
Graphics Platform: X11
Processors: 8 × Intel® Core™ i7-3630QM CPU @ 2.40GHz
Memory: 8 Gio of RAM (7.6 Gio usable)
Graphics Processor 1: Intel® HD Graphics 4000
Graphics Processor 2: llvmpipe
Manufacturer: Dell Inc.
Product Name: Inspiron 7720

Thank you very much in advance.