Huh, my bad. You are right, you can’t do that on zigbee devices. I was just reading up this device. Interesting that the flyer I found was in english for a quebec company.
If you have very few devices, you may reset the network but I would first try to exclude/include. From your description, I get the sense that you have failures because the network is weak. Zigbee on the vera has a very weak signal and you need to build out a strong mesh for it to be reliable. Try adding a zigbee plug for example very close to the vera. If your 2.4GHz is very busy, you may need to change the channel you have set your zigbee on.