You could just remove the device from a network and then un-claim it from the organisation. Request for Meraki support to move the license to another parking organisation which you also claim the device into.
This would cause the co-termination license date to change however would allow for some form of consistency with devices and licenses in your main organisation.
The Meraki Licensing calculator is also a good place to start when trying to understand/workout co-termination dates -
https://documentation.meraki.com/zGeneral_Administration/Licensing/Using_the_License_Calculator
Eliot F | Simplifying IT with Cloud Solutions
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