Error: network commissioning timed out - most likely network with the same panId or extendedPanId already exists nearby Error: AREQ - ZDO - stateChangeInd after 60000ms

You need to update pan_id in both zigbee2mqtt/configuration.yaml and zigbee2mqtt/coordinator_backup.json. Note that the values need to match, but in configuration.yaml the value is encoded decimal, while in coordinator_backup.json the value is encoded hexadecimal. You can use a tool to convert.

Here’s the steps:

• Make sure Z2M is stopped.
• Note the existing pan_id values (both hexadecimal and decimal)
• Change the value to something different. Make sure to use the same value in both files, but encode it decimal in the configuration and hexadecimal in he coordinator backup. (I just added 1 to the original value for simplicity.)
• Start Z2M.
• When Z2M has finished booting, stop it again.
• Change the pan_id back to the original values in both files.
• Start Z2M again.

If you have empty devices list:

1. Make sure Z2M is stopped.
2. Copy content from zigbee2mqtt/database.db.backup to zigbee2mqtt/database.db
3. Start Z2M again.