When an error is returned here, unlike the other error returns in the function, nothing is done to mark the added device as faulty or remove it.
I have observed this causing future snapshot creations to continue to attempt to use the same ID (from the sequence) to create new devices
and get blocked because the device already exists because it was not rolled back here.
Hopefully fixes#5110
Signed-off-by: Jeremy Williams <ctrlaltdel121@gmail.com>
51a72f0492