Cause: You are trying to install a higher firmware version than what’s allowed by your current bootloader (rare).
Fix: Only update to the immediate next version or use recovery mode to flash the same or newer version.

Proceed with caution. Installing custom firmware or modifying your console carries a risk of "bricking" the device (rendering it unusable). Additionally, downloading firmware files from unofficial sources can expose your computer to malware. This guide is for informational purposes only.

Even with a new download, you may encounter issues. Here is the fix guide.

NOTE: Modifying a PlayStation Vita or installing unofficial firmware can void warranties and risk bricking your device. This post focuses on obtaining official system update files (PSP2UPDAT.PUP) and installing them safely.

Cause: The PUP file is incomplete or unsigned for your region.
Fix: Redownload from a verified source. Ensure you are using the correct region (e.g., a Japanese console requires JP firmware).