It means that when the name of the drive is changed it may drop out of the array. You would have to stop the array and re-assign the disk. Data loss shouldn't be an issue. It's all still in the drive, just not accessible until you add the drive back into the array.
Probably a good idea to be sure you first have a list of the drive serial numbers and which array assignment they have (diskX, cache, parity, etc). Especially for the parity drive(s).