Either me or Sony.
New PS4 firmware update released, (9.00) about a month back, meant to improve things/smooth out settings, etc.
Some owners had issues with the update, but mine was fine. That is until I installed update 9.03, meant to correct the issues, and would have been installed automatically if online.
Damn thing crashed my console. Turned it on to have a bash on Assassins Creed, but console would not load. Kept entering safe mode and asking to update to 9.03,??? WTF, I've just done that!! Have now had to undertake a complete reinstalation, which has wiped all my saved data and games,and I had hundreds of hours invested in them since lockdown started. AND I WAS ON THE VIRGE OF FINISHING SKYRIM AND AC VALHALLA. (rant over)