I am using Sonoff S20 sockets with modified Arduino based fw. Recently I changed the firmware and also changed the name of each unit (Homey.begin(deviceName)). As I added a Capability I had to redo the pairing. First I removed the old devices, then I started the pairing. To my surprise all old device names (that were not available by that name on the network anymore, nor used in a Homey.begin()) were added to the pairing list again.
Then, in the pairing list I only selected one correct new device. But still all the others (those with the same IP-addresses) were added too. If I remove the old devices again, they are added again next pairing.
How do I get rid off the old pairing instances? Thanks again for your help.