Upgrade Firmware Version 1-255 Ubnt Download -upd- -

upgrade firmware version 1-255 ubnt download -upd- But that doesn’t match any real Ubiquiti syntax.

It looks like you’re asking for a of a process or document titled: "Upgrade Firmware Version 1-255 Ubnt Download -UPD-" However, the string you provided is not a standard firmware release note or a complete guide — it appears to be a fragment (possibly from an internal script, CLI command, or device log).