PSN Store access Rebug 4.81.2

Hello,
first of all, hope not to sound la the noobest of all.

i have a ps3 with CFW Rebug updated to the latest version.
in the last months i haven't used the console that much, but yesterday tried to acces psn store and i get the error that in order to login i need to update the system to the latest version.
i'm guessing by doing that it'll remove my cfw.

how can i acces the psn store without losing my CFW?
as i mentioned, my CFW is updated to the latest version.

any help or answer is...

PSN Store access Rebug 4.81.2