Configuring Zigbee2MQTT with SLZB always fails with "Error: network commissioning timed out - most likely network with the same panId or extendedPanId already exists nearby"

Configuration Zigbee
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Thanks for all the passwords to your zigbee network.

This reads like you copy - pasted what an AI replied to you.
How has your Home Assistant Journey been? What have you learned?
I know you probably read this when you started out here, but perhaps read this again. Having an AI talk (a lot) is a perfect way to get no one to answer you. I would suggest starting out with a short version of your story, what you have running & what you want to accomplish. As it is that post is TA;DR.