Description
More for info, I don't really have a solution, but some fixtures, e.g. this:
http://www.sunricher.com/industrial-level-5-channel-dmx512-rdm-decoder-sr-2108a-m5-5.html
Have different sets of personalities, depending on other fixture settings. In this case, changing the Channels from 1-5 presents either 8/16 bit control in 1 channel mode, through to 8 or 16 bit, or 8+strobe+master dimmer in 5 channel mode, so there may be two channel layouts with the same RDM Personality ID. I'm not sure without checking if it's in spec with the RDM standard, but it's out there as a fixture.
Your code here would error on that:
open-fixture-library/tests/fixture-valid.js
Lines 848 to 858 in ac4e260
But I don't really have a better idea, unless you have some concept of sub modes the device might be in, and move the uniqueness check to that level.