The .pup file might be corrupted. Re-download from a trusted source.
When searching for the target firmware, it is critical to rely on official or heavily verified community archives to prevent downloading corrupted files or malware. Psvupdat.pup Download
You can copy the official update link from Sony's support page directly into your browser to download the file directly from their content delivery network (CDN). 2. Trusted Homebrew Archives (For Older Firmware Versions) macOS) is your computer running?
What (Windows, macOS) is your computer running? Psvupdat.pup Download