Photon setup flashing cyan with a "quick red burst" (now orange burst) [Solved]

Please try generating a new device key, as described above, and then put the device in DFU mode and run

particle keys load mykey
particle keys send <DEVICE_ID> mykey.pub.pem

This will regenerate a key on the device and provide it to the cloud, which is allowed, since you have already claimed the device.

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