What is Default Lightlink Group in ZHA Zigbee groups?

Configuration Zigbee
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I have noticed that in my Groups tab in ZHA there is Default Lightlink Group with the group id: 0x0000. In Devices section it only lists my Coordinator two times (according to this github issue thread this is only a display bug).

My question is what is Default Lightlink Group in ZHA Zigbee groups?

I tried to find the answer on web, but haven’t found anything that directly answers this question. I want to know this in order to safely delete this group or keep it in case it’s an essential component of ZHA.

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Ever find an answer?

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Nope, my guess is it has to do something with Zigbee Light Link (ZLL), which is a standard for controlling lights with Zigbee (source). Probably it stores some code to control Zigbee lighting devices, so I left it as it is in my groups tab for now.

If anyone has better knowledge about this topic, a better explanation would still be appreciated :blush: