Absolutely!
I would just remove the gen 2 controller from your account. If it is not online at the time I would also do a factory reset on the controller.
https://support.rachio.com/hc/en-us/articles/115010541188-How-do-I-factory-reset-my-controller-
Yes, if the controller has been removed from your account and factory reset he should be good to go.
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