I really appreciate you reaching out about this, @alequyoutube - I'm sorry to hear your Valhalla saves are corrupt on your PS4, and I'd really like to help.
We're currently investigating the issue, and I'd like to ask a few questions to help with this. Can you answer the questions below for me?
• How many corrupted saves do you have? Is that all of them?
• Last time you played it before the nine months, did you put the console into rest mode with the game still running? If so, was it in rest mode for the full nine months, or did you switch off the PS4 or launch another game during that time?
• Please take a moment to follow our troubleshooting guide. In particular, please make sure you've fully updated the system and all its software, given it a hard reset, and rebuilt the database.
• Which expansions do you have installed, if any?
Once I've got answers to the above, I'll be able to pass on your report to help with our ongoing investigation. Thanks so much for your help!