The C-7 has the ability to replace ZWave devices.
Zigbee have factory set hard coded Node Numbers. They never change and thus once its paired to a hub, its identity is known. This allows it to be a "device previously known." to the hub, and get dropped right back into that known spot. However, Zigbee doesn't have a replace... if the device actually dies and you buy a replacement, the device will pair as a never-before-seen.
On the ZWave Details page devices is a stack of buttons for each device. Ideally you want the stack to be Refresh and Repair:
ZWave has a replace option and it can be used to reuse a node number. More steps though...
Just click the Replace button and the Hub goes into Replace mode. IT's 90% the same as an Include, but it reuses an existing Node Number [0x0F (015)] in this example case. The physical device is then put into Join and as if by magic, the Replace is complete.
For completeness, I'll remind the reader that Include only works with previously Excluded devices. If you are in fact, replacing an existing device with the same physical device, you need to externally factory reset it before starting the Replace process. I have an Aeon Z-Stick for that... it's not joined to any of my ZWave networks and thus when I put it in exclude mode and perform the necessary click dance on the physical device, the Z-Stick will blink to tell me it excluded. If my Z-Stick was dead, needing a charge, I'd just use one of my other hubs to be the hub to put into exclude and watch it say "unknown device excluded".