Cold weather 3 hour power/internet outtage - ST messed up [again]

You shouldn’t have to delete ANYTHING. In fact it may make your life difficult.

As to HOW to repair routes - both processes are in this post from @JDRoberts A Guide to Wireless Range & Repeaters - Wiki / FAQ - SmartThings Community

How to delete a ghost --ONLY if this is an actual ghost, meaning how to clear a device ID out of your system that’s no longer associated with any Device - the process is basically the same for ZWave or Zigbee Just ZWave has 2 digit Hex numbers and Zigbee has 4 digit IDs