Can I "remove/re-add" a device without breaking all routines and rules?

[JDRoberts]

With a zwave device, you can do it with the Replace Utility. That’s exactly what it’s for. It assigns the old network ID to the new device (or to the same device if you’re adding it again for a second time).

https://support.smartthings.com/hc/en-us/articles/204392810-What-does-Z-Wave-Replace-do-

If this is a Zigbee bulb using a ZHA profile to connect directly to the SmartThings hub, it’s likely you can just physically reset it and readd it without ever removing it and everything will work fine because the zigbee device has its own unique ID. You shouldn’t have to touch the smartapps because the device ID will be the same.

See the steps in the following:

FAQ: GE Link Bulbs Dropped Offline

GE Links are the least expensive big brand zigbee bulbs you can buy, and, for whatever reason, they seem to sometimes have trouble reconnecting to the SmartThings network after power has been cut, whether it’s from a whole house failure or just someone flipping a switch. Or even just randomly from time to time. (SmartThings staff have confirmed in the forums that the reason the GE links are not on the official “works with SmartThings” compatibility list is that they have a firmware problem which causes them to stop responding to the Cordinator from time to time. Supposedly GE is aware of the issue and there may be a firmware update from GE in a few months, but no specific timeline and they can’t be certified as compatible yet. Meanwhile, they’re very inexpensive, but they do drop off fro…

If this is a zigbee bulb using A ZLL profile to connect through the Phillips hue bridge, I’m not sure exactly how it works.