Once booted into CFW:

Nintendo released a new firmware (e.g., 18.0.0+), and your old sigpatches -2-.zip is obsolete. Fix: Sigpatches must match your firmware version AND Atmosphère version . Always download the latest sigpatches -2-.zip after updating your Switch OFW.

The patches "trick" the kernel into treating unsigned software as if it were verified by Nintendo.

The unusual syntax ( -2- ) is a legacy naming convention from early Switch hacking forums (GBAtemp, etc.) to prevent file crawlers from misinterpreting version numbers. It ensures that file sorting scripts treat it as a distinct string.

To understand the file, you must first understand the problem it solves.

The direct file name, , is a specific distribution package created by the community maintainers (often linked to the "iTotalJustice" or "HITMAN" releases). The name contains several clues: