Msi SPATIUM S270 SATA 2.5" firmware

hi lately i had issues with my ssd and i figured out that i need to flash my ssd with a new firmware , but i could not find the firmware “SBFM6B.5” anywhere , so what should i do cz i tried a couple other firmwares but i always get AP key failure because of the missmatching firmware branch of version

The Phison S11 firmware version are hardware related to the OEM pcb versions of each disk/batch launched, you shouldnt try to cross flash fw versions.
MSI center will detect the latest avaiable.

Those “issues” are vague information…