I use a distribution called "FossaDog", with is a connection of Puppy Linux and Ubuntu (fossa) as a LiveUSB.
In it, the latest avaliable version is shown as 1.28-2, even if there is a newer version avaliable.
Ahead of your possible nex question: no, I can't update it to the groovy version because to sucessfully do that, I would need to install it into a hard drive, and, I don't know why, it appeared some strange bootloader issue (with got reported), with makes impossible to boot the installed system, plus there is no newer ISO then the one I had used to make the LiveUSB