It looks like after a recent Alexa update many of us will need to rename our devices.
It is now recommended not to add room names to the device.
if so you could get the
"I'm sorry several devices share that name ,which one did you want?" reply
I've started to get that with the lamp I called livingroom lamp, I haven't got it for office light (yet)
interestingly I do have a couple lights in my livingroom but I do not have a room configured in Alexa called livingroom.
Also the lamp is the only one with livingroom in the name.
So now Alexa has issues with room or numbers in device names