Reusing names without any indicator to differentiate is just bad.
It hasn't turned out to be a problem in practice but I think Canon actually had a mount called the RF in the 50s or 60s?
It definitely had an FD-mount camera called the EF AND one called the EF-M, and replaced the FD mount with the EF mount, and later introduced an EF-M mount, which is simply silly.
Ditto F-1 and "New F-1."
Japanese also kind of play this game naming highways and the like: there's a highway officially called the "previously Meiji Highway," "previously Coastal Highway" and so on.
Japanese keyboard instrument manufacturer Korg has reused a couple names twice, I think Triton comes to mind for two utterly different keyboards, one around 1980, one around 2000. They also had two organs named CX-3, an analog-electronic one and a digital one.
Eden made about four bass guitar amps called World Tour 800, and Roland made about seven versions of the guitar amp called JC-120. It's not like there's a massive shortage of three-digit numerals, why not just call them the 800, 801, 802, 803, etc.?
An interesting thing is that most car makers reuse a model name (Corolla, Mustang) for many generations of cars, but Ferrari doesn't. The F430 is the F430 of 2002-2008 or whatever. They're all the same car.