Yes, this implies that trezor developers know of fake devices claiming to run that version so they skipped that version number to ensure that no one who sees that version number would confuse it with an actual version.
What does that achieve? Surely the fraudsters wouldn't dare to use one of the "actually secure" version numbers in their attempts to deceive Trezor users...?
uh oh! does this imply something is up that the trezor developers know of?